Initial: 22 MCP tool-call fixtures (valid + invalid)

README.md

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+---
+license: mit
+language:
+  - en
+tags:
+  - mcp
+  - model-context-protocol
+  - tool-use
+  - testing
+  - agents
+  - validation
+size_categories:
+  - n<1K
+configs:
+  - config_name: default
+    data_files:
+      - split: train
+        path: data.jsonl
+---
+
+# mcp-tool-test-fixtures
+
+22 test fixtures for common MCP (Model Context Protocol) tool calls — a mix of valid and invalid args across 8 categories. Use these to test tool-arg validators, sandboxes, or any layer that sits between an LLM and a tool.
+
+## Categories
+
+| Category | Count |
+|---|---|
+| `filesystem` | 5 |
+| `git` | 3 |
+| `github` | 3 |
+| `slack` | 2 |
+| `http` | 3 |
+| `shell` | 2 |
+| `calculator` | 2 |
+| `web` | 2 |
+
+About **half** are intentionally invalid — missing required fields, dangerous commands, escape attempts, wrong types — so your validator gets exercised on negative cases too.
+
+## Schema
+
+```jsonc
+{
+  "id": "string",
+  "tool": "string",                  // dotted MCP tool name
+  "args": { ... },                   // args the LLM produced
+  "expected": {
+    "valid": true | false,
+    "reason": "string"               // present when invalid
+  },
+  "category": "string"
+}
+```
+
+## Quickstart
+
+```python
+from datasets import load_dataset
+ds = load_dataset("mukunda1729/mcp-tool-test-fixtures", split="train")
+invalid = [r for r in ds if not r["expected"]["valid"]]
+print(f"{len(invalid)} invalid cases for negative testing")
+```
+
+## Related
+
+- [`agentvet` on PyPI](https://pypi.org/project/agentvet-py/) — wraps tool calls, validates args, returns LLM-friendly retry hints
+- [The Agent Reliability Stack](https://mukundakatta.github.io/agent-stack/)
+
+## License
+
+MIT.

data.jsonl

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+{"id": "fs-read-1", "tool": "filesystem.read_file", "args": {"path": "/tmp/example.txt"}, "expected": {"valid": true}, "category": "filesystem"}
+{"id": "fs-read-2", "tool": "filesystem.read_file", "args": {"path": "../../../etc/passwd"}, "expected": {"valid": false, "reason": "path_escape"}, "category": "filesystem"}
+{"id": "fs-read-3", "tool": "filesystem.read_file", "args": {}, "expected": {"valid": false, "reason": "missing_required: path"}, "category": "filesystem"}
+{"id": "fs-write-1", "tool": "filesystem.write_file", "args": {"path": "/tmp/out.txt", "content": "hello"}, "expected": {"valid": true}, "category": "filesystem"}
+{"id": "fs-write-2", "tool": "filesystem.write_file", "args": {"path": "/tmp/out.txt", "content": 123}, "expected": {"valid": false, "reason": "wrong_type: content must be string"}, "category": "filesystem"}
+{"id": "git-status-1", "tool": "git.status", "args": {"repo": "/Users/me/proj"}, "expected": {"valid": true}, "category": "git"}
+{"id": "git-commit-1", "tool": "git.commit", "args": {"repo": "/Users/me/proj", "message": "fix bug"}, "expected": {"valid": true}, "category": "git"}
+{"id": "git-commit-2", "tool": "git.commit", "args": {"repo": "/Users/me/proj"}, "expected": {"valid": false, "reason": "missing_required: message"}, "category": "git"}
+{"id": "github-search-1", "tool": "github.search_issues", "args": {"q": "is:open label:bug"}, "expected": {"valid": true}, "category": "github"}
+{"id": "github-issue-1", "tool": "github.create_issue", "args": {"repo": "owner/name", "title": "bug", "body": "details"}, "expected": {"valid": true}, "category": "github"}
+{"id": "github-issue-2", "tool": "github.create_issue", "args": {"repo": "owner/name"}, "expected": {"valid": false, "reason": "missing_required: title"}, "category": "github"}
+{"id": "slack-send-1", "tool": "slack.send_message", "args": {"channel": "#general", "text": "hi"}, "expected": {"valid": true}, "category": "slack"}
+{"id": "slack-send-2", "tool": "slack.send_message", "args": {"channel": "#general"}, "expected": {"valid": false, "reason": "missing_required: text"}, "category": "slack"}
+{"id": "fetch-1", "tool": "fetch.get", "args": {"url": "https://api.example.com/v1/data"}, "expected": {"valid": true}, "category": "http"}
+{"id": "fetch-2", "tool": "fetch.get", "args": {"url": "file:///etc/passwd"}, "expected": {"valid": false, "reason": "scheme_not_allowed"}, "category": "http"}
+{"id": "fetch-3", "tool": "fetch.get", "args": {"url": "not-a-url"}, "expected": {"valid": false, "reason": "invalid_url"}, "category": "http"}
+{"id": "shell-1", "tool": "shell.exec", "args": {"cmd": "ls"}, "expected": {"valid": true}, "category": "shell"}
+{"id": "shell-2", "tool": "shell.exec", "args": {"cmd": "rm -rf /"}, "expected": {"valid": false, "reason": "dangerous_command"}, "category": "shell"}
+{"id": "calc-1", "tool": "calculator.eval", "args": {"expr": "2+2"}, "expected": {"valid": true}, "category": "calculator"}
+{"id": "calc-2", "tool": "calculator.eval", "args": {"expr": "__import__('os').system('ls')"}, "expected": {"valid": false, "reason": "unsafe_expression"}, "category": "calculator"}
+{"id": "search-1", "tool": "web.search", "args": {"q": "python tutorials", "num": 5}, "expected": {"valid": true}, "category": "web"}
+{"id": "search-2", "tool": "web.search", "args": {"q": "", "num": 5}, "expected": {"valid": false, "reason": "empty_query"}, "category": "web"}