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mcp-wcgw

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Python
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ReadFiles

Read-only

Read complete file contents from specified absolute paths, including multiple files at once. Optionally extract specific line ranges when line numbers are needed for the task.

Instructions

  • Read full file content of one or more files.

  • Use the thread_id returned by Initialize for this conversation when available; legacy clients may omit it.

  • Provide absolute paths only (~ allowed)

  • Only if the task requires line numbers understanding:

    • You may extract a range of lines. E.g., /path/to/file:1-10 for lines 1-10. You can drop start or end like /path/to/file:1- or /path/to/file:-10

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
thread_idNo
file_pathsYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changedv5.6.6
    • addedInput schema / properties / thread_id
      Added value: +{
+  "default": "",
+  "type": "string"
+}
  2. First observed

TDQS

A4.5/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already mark the tool read-only and closed-world, so no further safety disclosure is needed. The description adds useful operational behavior: path expectations, line-range syntax, and thread_id sourcing. It does not cover error or return behavior, but this is a minor gap for a simple read tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Four tight bullet points lead with the core purpose, and the conditional line-range rule is clearly nested. There is no filler; every sentence contributes to correct invocation.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a two-parameter, read-only tool with no output schema, the description is nearly complete: it covers paths, line ranges, and thread_id. It does not specify how multiple file contents are returned, but the simple nature of the tool makes the output inferable.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters5/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must carry parameter meaning, and it does. It explains file_paths as absolute paths with optional range syntax and clarifies thread_id availability ('returned by Initialize', 'legacy clients may omit it'), adding real semantics beyond the bare schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description opens with 'Read full file content of one or more files,' a specific verb-resource pair with clear scope (full content, multiple files). This distinguishes it from siblings such as FileWriteOrEdit, ReadImage, and BashCommand without needing to open schemas.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides concrete guidance: absolute paths only with ~ allowed, line-range extraction only when line numbers are needed, and reuse of thread_id from Initialize. It does not explicitly state when not to use this tool or name alternatives, but the conditional usage is clear.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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