Loading ToolBench
A comprehensive toolkit for Model Context Protocol with dynamic tool registration, multiple transport options (stdio and SSE), and integrated tools for file operations, browser automation, web search, time/timezone conversion, data analysis, and more.
MCP Tool Kit has 22 tools with reasonable baseline coverage but significant quality gaps. Tool names follow verb_noun patterns (health_check, list_tools, read_file, etc.), which is good. However, parameter schemas are present but descriptions are inconsistent, many parameters lack detail about format, constraints, or valid ranges. Error handling is not visible in the source, and output schemas are not documented. The toolkit mixes file operations, time utilities, web search, and browser automation in one server, which trades composition clarity for coverage. Descriptions average ~60 chars (below the 194-char baseline for A+ tools) and lack context about when to use each tool vs. alternatives. No tool annotations (readOnlyHint, destructiveHint, idempotentHint) are present despite clear READ_ONLY vs WRITE distinctions. This is a functional but mediocre toolkit, typical of community MCP servers that prioritize breadth over depth.
Search for local businesses and places using Brave's Local Search API.
Perform a web search using Brave Search.
Convert time between timezones
Create a new directory or ensure a directory exists.
Get a recursive tree view of a directory as JSON.
Make line-based edits to a text file.
Get current time in specified timezone
No tool annotations (readOnlyHint, destructiveHint, idempotentHint) despite clear risk classification. Tools marked READ_ONLY vs WRITE in metadata but not exposed to LLM.
Parameter descriptions lack format constraints and valid ranges. E.g., 'timezone' param in get_current_time has basic description but no guidance on valid IANA zone names or error handling for invalid zones.
No documented output schemas. Tools return values but LLMs have no formal description of the response structure (fields, types, nested objects). E.g., directory_tree returns 'JSON string' but the schema of that JSON is not documented.
Inferred effective spec: <=2025-11-25.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-22 | C | 61 | <=2025-11-25 | v2 |
| 2026-03-09 | C | 61 | - | v1 |
Get detailed information about a file or directory.
Check the health status of the MCP server.
List all directories that the server is allowed to access.
List contents of a directory.
List all registered tools and their status.
Move or rename a file or directory.
Close a browser instance and all its pages.
Close a specific page.
Launch a new browser instance.
Navigate to a URL.
Create a new page in an existing browser context.
Read the contents of a file.
Read multiple files at once.
Search for files matching a pattern.
Write content to a file. Creates the file if it doesn't exist.
Error handling not visible in source. No evidence of recovery guidance, categorization (retryable vs fatal), or actionable error messages. LLMs will struggle to self-correct on failures.
File operation tools (read_file, write_file, etc.) lack path traversal and injection protection documentation. No mention of allowed directory restrictions or escaping rules in descriptions.
Playwright tools lack idempotency documentation. browser_id and page_id management strategy is unclear, will repeated calls create duplicates or reuse existing instances?
search_files and brave_web_search lack pagination guidance. No mention of result limits, offset behavior, or when to use limit vs count parameters.
Tool descriptions are generic and lack 'when to use' context. E.g., 'List contents of a directory' tells LLM WHAT but not WHEN to choose this over directory_tree. No distinction between list_directory and directory_tree usage patterns.
Brave Search API credentials must be injected server-side; unclear from source if this is done. If not, risk of exposing API keys in traces.
Playwright browser_id and page_id are opaque references. No guidance on how LLM should manage session state across multiple calls or what happens if an invalid ID is passed.