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The dataset generation failed because of a cast error
Error code: DatasetGenerationCastError
Exception: DatasetGenerationCastError
Message: An error occurred while generating the dataset
All the data files must have the same columns, but at some point there are 6 new columns ({'relationType', 'observations', 'entityType', 'from', 'to', 'type'}) and 2 missing columns ({'description', 'tier'}).
This happened while the json dataset builder was generating data using
hf://datasets/happynood/quantmcp-suite/tasks/u4_memory/memory.json (at revision bd2c5734ee57476972ffa22beb6ca21e89bd11e4), ['hf://datasets/happynood/quantmcp-suite@bd2c5734ee57476972ffa22beb6ca21e89bd11e4/schemas/tool_schemas.json', 'hf://datasets/happynood/quantmcp-suite@bd2c5734ee57476972ffa22beb6ca21e89bd11e4/tasks/u4_memory/memory.json'], ['hf://datasets/happynood/quantmcp-suite@bd2c5734ee57476972ffa22beb6ca21e89bd11e4/schemas/tool_schemas.json', 'hf://datasets/happynood/quantmcp-suite@bd2c5734ee57476972ffa22beb6ca21e89bd11e4/tasks/u4_memory/memory.json']
Please either edit the data files to have matching columns, or separate them into different configurations (see docs at https://hf.co/docs/hub/datasets-manual-configuration#multiple-configurations)
Traceback: Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1837, in _prepare_split_single
writer.write_table(table)
~~~~~~~~~~~~~~~~~~^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/arrow_writer.py", line 765, in write_table
self._write_table(pa_table, writer_batch_size=writer_batch_size)
~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/arrow_writer.py", line 773, in _write_table
pa_table = table_cast(pa_table, self._schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2369, in table_cast
return cast_table_to_schema(table, schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2297, in cast_table_to_schema
raise CastError(
...<3 lines>...
)
datasets.table.CastError: Couldn't cast
type: string
name: string
entityType: string
observations: list<item: string>
child 0, item: string
input_schema: extension<arrow.json>
from: string
to: string
relationType: string
-- schema metadata --
huggingface: '{"info": {"features": {"type": {"dtype": "string", "_type":' + 379
to
{'tier': Value('string'), 'name': Value('string'), 'description': Value('string'), 'input_schema': Json(decode=True)}
because column names don't match
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1369, in compute_config_parquet_and_info_response
parquet_operations, partial, estimated_dataset_info = stream_convert_to_parquet(
~~~~~~~~~~~~~~~~~~~~~~~~~^
builder, max_dataset_size_bytes=max_dataset_size_bytes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 948, in stream_convert_to_parquet
builder._prepare_split(split_generator=splits_generators[split], file_format="parquet")
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1683, in _prepare_split
for job_id, done, content in self._prepare_split_single(
~~~~~~~~~~~~~~~~~~~~~~~~~~^
gen_kwargs=gen_kwargs, job_id=job_id, **_prepare_split_args
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
):
^
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1839, in _prepare_split_single
raise DatasetGenerationCastError.from_cast_error(
...<4 lines>...
)
datasets.exceptions.DatasetGenerationCastError: An error occurred while generating the dataset
All the data files must have the same columns, but at some point there are 6 new columns ({'relationType', 'observations', 'entityType', 'from', 'to', 'type'}) and 2 missing columns ({'description', 'tier'}).
This happened while the json dataset builder was generating data using
hf://datasets/happynood/quantmcp-suite/tasks/u4_memory/memory.json (at revision bd2c5734ee57476972ffa22beb6ca21e89bd11e4), ['hf://datasets/happynood/quantmcp-suite@bd2c5734ee57476972ffa22beb6ca21e89bd11e4/schemas/tool_schemas.json', 'hf://datasets/happynood/quantmcp-suite@bd2c5734ee57476972ffa22beb6ca21e89bd11e4/tasks/u4_memory/memory.json'], ['hf://datasets/happynood/quantmcp-suite@bd2c5734ee57476972ffa22beb6ca21e89bd11e4/schemas/tool_schemas.json', 'hf://datasets/happynood/quantmcp-suite@bd2c5734ee57476972ffa22beb6ca21e89bd11e4/tasks/u4_memory/memory.json']
Please either edit the data files to have matching columns, or separate them into different configurations (see docs at https://hf.co/docs/hub/datasets-manual-configuration#multiple-configurations)Need help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
tier string | name string | description string | input_schema string |
|---|---|---|---|
filesystem | read_file | Read the complete contents of a file as text. DEPRECATED: Use read_text_file instead. | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"path":{"type":"string"},"tail":{"description":"If provided, returns only the last N lines of the file","type":"number"},"head":{"description":"If provided, returns only the first N lines of the file","type":"number"}},"required":["p... |
filesystem | read_text_file | Read the complete contents of a file from the file system as text. Handles various text encodings and provides detailed error messages if the file cannot be read. Use this tool when you need to examine the contents of a single file. Use the 'head' parameter to read only the first N lines of a file, or the 'tail' parame... | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"path":{"type":"string"},"tail":{"description":"If provided, returns only the last N lines of the file","type":"number"},"head":{"description":"If provided, returns only the first N lines of the file","type":"number"}},"required":["p... |
filesystem | read_media_file | Read an image or audio file. Returns the base64 encoded data and MIME type. Only works within allowed directories. | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"path":{"type":"string"}},"required":["path"]} |
filesystem | read_multiple_files | Read the contents of multiple files simultaneously. This is more efficient than reading files one by one when you need to analyze or compare multiple files. Each file's content is returned with its path as a reference. Failed reads for individual files won't stop the entire operation. Only works within allowed director... | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"paths":{"minItems":1,"type":"array","items":{"type":"string"},"description":"Array of file paths to read. Each path must be a string pointing to a valid file within allowed directories."}},"required":["paths"]} |
filesystem | write_file | Create a new file or completely overwrite an existing file with new content. Use with caution as it will overwrite existing files without warning. Handles text content with proper encoding. Only works within allowed directories. | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"path":{"type":"string"},"content":{"type":"string"}},"required":["path","content"]} |
filesystem | edit_file | Make line-based edits to a text file. Each edit replaces exact line sequences with new content. Returns a git-style diff showing the changes made. Only works within allowed directories. | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"path":{"type":"string"},"edits":{"type":"array","items":{"type":"object","properties":{"oldText":{"type":"string","description":"Text to search for - must match exactly"},"newText":{"type":"string","description":"Text to replace wit... |
filesystem | create_directory | Create a new directory or ensure a directory exists. Can create multiple nested directories in one operation. If the directory already exists, this operation will succeed silently. Perfect for setting up directory structures for projects or ensuring required paths exist. Only works within allowed directories. | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"path":{"type":"string"}},"required":["path"]} |
filesystem | list_directory | Get a detailed listing of all files and directories in a specified path. Results clearly distinguish between files and directories with [FILE] and [DIR] prefixes. This tool is essential for understanding directory structure and finding specific files within a directory. Only works within allowed directories. | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"path":{"type":"string"}},"required":["path"]} |
filesystem | list_directory_with_sizes | Get a detailed listing of all files and directories in a specified path, including sizes. Results clearly distinguish between files and directories with [FILE] and [DIR] prefixes. This tool is useful for understanding directory structure and finding specific files within a directory. Only works within allowed directori... | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"path":{"type":"string"},"sortBy":{"default":"name","description":"Sort entries by name or size","type":"string","enum":["name","size"]}},"required":["path"]} |
filesystem | directory_tree | Get a recursive tree view of files and directories as a JSON structure. Each entry includes 'name', 'type' (file/directory), and 'children' for directories. Files have no children array, while directories always have a children array (which may be empty). The output is formatted with 2-space indentation for readability... | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"path":{"type":"string"},"excludePatterns":{"default":[],"type":"array","items":{"type":"string"}}},"required":["path"]} |
filesystem | move_file | Move or rename files and directories. Can move files between directories and rename them in a single operation. If the destination exists, the operation will fail. Works across different directories and can be used for simple renaming within the same directory. Both source and destination must be within allowed directo... | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"source":{"type":"string"},"destination":{"type":"string"}},"required":["source","destination"]} |
filesystem | search_files | Recursively search for files and directories matching a pattern. The patterns should be glob-style patterns that match paths relative to the working directory. Use pattern like '*.ext' to match files in current directory, and '**/*.ext' to match files in all subdirectories. Returns full paths to all matching items. Gre... | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"path":{"type":"string"},"pattern":{"type":"string"},"excludePatterns":{"default":[],"type":"array","items":{"type":"string"}}},"required":["path","pattern"]} |
filesystem | get_file_info | Retrieve detailed metadata about a file or directory. Returns comprehensive information including size, creation time, last modified time, permissions, and type. This tool is perfect for understanding file characteristics without reading the actual content. Only works within allowed directories. | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"path":{"type":"string"}},"required":["path"]} |
filesystem | list_allowed_directories | Returns the list of directories that this server is allowed to access. Subdirectories within these allowed directories are also accessible. Use this to understand which directories and their nested paths are available before trying to access files. | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{}} |
git | git_status | Shows the working tree status | {"properties":{"repo_path":{"title":"Repo Path","type":"string"}},"required":["repo_path"],"title":"GitStatus","type":"object"} |
git | git_diff_unstaged | Shows changes in the working directory that are not yet staged | {"properties":{"repo_path":{"title":"Repo Path","type":"string"},"context_lines":{"default":3,"title":"Context Lines","type":"integer"}},"required":["repo_path"],"title":"GitDiffUnstaged","type":"object"} |
git | git_diff_staged | Shows changes that are staged for commit | {"properties":{"repo_path":{"title":"Repo Path","type":"string"},"context_lines":{"default":3,"title":"Context Lines","type":"integer"}},"required":["repo_path"],"title":"GitDiffStaged","type":"object"} |
git | git_diff | Shows differences between branches or commits | {"properties":{"repo_path":{"title":"Repo Path","type":"string"},"target":{"title":"Target","type":"string"},"context_lines":{"default":3,"title":"Context Lines","type":"integer"}},"required":["repo_path","target"],"title":"GitDiff","type":"object"} |
git | git_commit | Records changes to the repository | {"properties":{"repo_path":{"title":"Repo Path","type":"string"},"message":{"title":"Message","type":"string"}},"required":["repo_path","message"],"title":"GitCommit","type":"object"} |
git | git_add | Adds file contents to the staging area | {"properties":{"repo_path":{"title":"Repo Path","type":"string"},"files":{"items":{"type":"string"},"title":"Files","type":"array"}},"required":["repo_path","files"],"title":"GitAdd","type":"object"} |
git | git_reset | Unstages all staged changes | {"properties":{"repo_path":{"title":"Repo Path","type":"string"}},"required":["repo_path"],"title":"GitReset","type":"object"} |
git | git_log | Shows the commit logs | {"properties":{"repo_path":{"title":"Repo Path","type":"string"},"max_count":{"default":10,"title":"Max Count","type":"integer"},"start_timestamp":{"anyOf":[{"type":"string"},{"type":"null"}],"default":null,"description":"Start timestamp for filtering commits. Accepts: ISO 8601 format (e.g., '2024-01-15T14:30:25'), rel... |
git | git_create_branch | Creates a new branch from an optional base branch | {"properties":{"repo_path":{"title":"Repo Path","type":"string"},"branch_name":{"title":"Branch Name","type":"string"},"base_branch":{"anyOf":[{"type":"string"},{"type":"null"}],"default":null,"title":"Base Branch"}},"required":["repo_path","branch_name"],"title":"GitCreateBranch","type":"object"} |
git | git_checkout | Switches branches | {"properties":{"repo_path":{"title":"Repo Path","type":"string"},"branch_name":{"title":"Branch Name","type":"string"}},"required":["repo_path","branch_name"],"title":"GitCheckout","type":"object"} |
git | git_show | Shows the contents of a commit | {"properties":{"repo_path":{"title":"Repo Path","type":"string"},"revision":{"title":"Revision","type":"string"}},"required":["repo_path","revision"],"title":"GitShow","type":"object"} |
git | git_branch | List Git branches | {"properties":{"repo_path":{"description":"The path to the Git repository.","title":"Repo Path","type":"string"},"branch_type":{"description":"Whether to list local branches ('local'), remote branches ('remote') or all branches('all').","title":"Branch Type","type":"string"},"contains":{"anyOf":[{"type":"string"},{"typ... |
sqlite | list_tables | List every table name in the sandboxed sqlite database. | {"properties":{},"title":"list_tablesArguments","type":"object"} |
sqlite | describe_table | Describe the columns of `table` (name, type, nullable, primary key). | {"properties":{"table":{"title":"Table","type":"string"}},"required":["table"],"title":"describe_tableArguments","type":"object"} |
sqlite | read_query | Run a read-only SELECT query against the sandboxed sqlite database. | {"properties":{"query":{"title":"Query","type":"string"}},"required":["query"],"title":"read_queryArguments","type":"object"} |
sqlite | write_query | Run an INSERT/UPDATE/DELETE statement against the sandboxed sqlite database. | {"properties":{"query":{"title":"Query","type":"string"}},"required":["query"],"title":"write_queryArguments","type":"object"} |
memory | create_entities | Create multiple new entities in the knowledge graph | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"entities":{"type":"array","items":{"type":"object","properties":{"name":{"type":"string","description":"The name of the entity"},"entityType":{"type":"string","description":"The type of the entity"},"observations":{"type":"array","i... |
memory | create_relations | Create multiple new relations between entities in the knowledge graph. Relations should be in active voice | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"relations":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"The name of the entity where the relation starts"},"to":{"type":"string","description":"The name of the entity where the relati... |
memory | add_observations | Add new observations to existing entities in the knowledge graph | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"observations":{"type":"array","items":{"type":"object","properties":{"entityName":{"type":"string","description":"The name of the entity to add the observations to"},"contents":{"type":"array","items":{"type":"string"},"description"... |
memory | delete_entities | Delete multiple entities and their associated relations from the knowledge graph | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"entityNames":{"type":"array","items":{"type":"string"},"description":"An array of entity names to delete"}},"required":["entityNames"]} |
memory | delete_observations | Delete specific observations from entities in the knowledge graph | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"deletions":{"type":"array","items":{"type":"object","properties":{"entityName":{"type":"string","description":"The name of the entity containing the observations"},"observations":{"type":"array","items":{"type":"string"},"descriptio... |
memory | delete_relations | Delete multiple relations from the knowledge graph | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"relations":{"type":"array","items":{"type":"object","properties":{"from":{"type":"string","description":"The name of the entity where the relation starts"},"to":{"type":"string","description":"The name of the entity where the relati... |
memory | read_graph | Read the entire knowledge graph | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{}} |
memory | search_nodes | Search for nodes in the knowledge graph based on a query | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"query":{"type":"string","description":"The search query to match against entity names, types, and observation content"}},"required":["query"]} |
memory | open_nodes | Open specific nodes in the knowledge graph by their names | {"$schema":"http:\/\/json-schema.org\/draft-07\/schema#","type":"object","properties":{"names":{"type":"array","items":{"type":"string"},"description":"An array of entity names to retrieve"}},"required":["names"]} |
null | Alice | null | null |
null | Bob | null | null |
null | Acme Corp | null | null |
null | Project Falcon | null | null |
null | null | null | null |
null | null | null | null |
null | null | null | null |
QuantMCP Suite
Task fixtures and frozen tool schemas for the QuantMCP benchmark, which measures whether quantization-driven function-calling degradation (first shown on curated BFCL/ToolACE schemas by QuantCall) carries over to real, unmodified Model Context Protocol server tool schemas.
Unlike QuantCall's suite, everything here is originated by this project under MIT — there is no third-party licensed data to gate or manifest-only reference, since every task is hand-written against a real MCP reference server's actual tool surface.
Contents
| Path | Description |
|---|---|
tasks/u0_tasks.yaml |
2 smoke tasks against the in-repo toy FastMCP server |
tasks/u1_filesystem_tasks.yaml + tasks/u1_filesystem/ |
13 naturalistic tasks + fixture directory (including a minimal PNG fixture for read_media_file) for the official @modelcontextprotocol/server-filesystem reference server |
tasks/u2_git_tasks.yaml + tasks/u2_git/repo.tar.gz |
12 naturalistic tasks + a deterministic fixture git repository (packed as a tarball — a nested .git can't be committed as plain content) for the official mcp-server-git reference server |
tasks/u3_sqlite_tasks.yaml + tasks/u3_sqlite/fixture.db |
10 naturalistic tasks + a fixture SQLite database for a self-written FastMCP wrapper (the official sqlite reference server is not currently maintained upstream — see docs/RUN_REAL.md in the GitHub repo) |
tasks/u4_memory_tasks.yaml + tasks/u4_memory/memory.json |
10 naturalistic tasks + a fixture knowledge-graph seed file for the official @modelcontextprotocol/server-memory reference server |
schemas/tool_schemas.json |
Frozen live tool schemas (name, description, JSON Schema) for all 39 tools across the four real server tiers (14 filesystem + 12 git + 4 sqlite + 9 memory), dumped via quantmcp dump-schemas. This is the exact corpus the Schema Complexity Index (SCI) is computed from. |
Every task declares which tool it targets (tool: in the YAML — analysis
metadata only, never shown to the model) and is naturalistic in its
instruction (never names the tool to call), verified against the real
server's actual response before being trusted — see the GitHub repo's
docs/RUN_REAL.md for the full methodology and honesty caveats, including
the one live tool (read_file, deprecated in favor of the schema-identical
read_text_file) deliberately left without a task.
How to reproduce
git clone https://github.com/Happynood/quant-mcp-bench
cd quant-mcp-bench
uv sync --extra llama-cpp
uv run quantmcp run --config configs/qwen3-0.6b-u1-sweep/Q4_K_M.yaml
uv run quantmcp dump-schemas --tiers filesystem,git,sqlite,memory --output tool_schemas.json
Links
- GitHub: https://github.com/Happynood/quant-mcp-bench
- Results dataset: https://huggingface.co/datasets/happynood/quantmcp-results
- Leaderboard (Space): https://huggingface.co/spaces/happynood/quantmcp-leaderboard
- Sibling project (curated-schema quantization benchmark): https://github.com/Happynood/quant-toolcall-bench
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