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PatchWarden

by jiezeng2004-design
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TypeScript
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get_task_stdout_tail

Read the last N lines of a task's stdout/stderr to monitor progress. Works for pending, running, or completed tasks, with fallback to result.md.

Instructions

Read the last N lines of agent stdout/stderr. Reads from real-time stdout.log/stderr.log during execution, falls back to result.md after completion. Works on pending, running, and completed tasks. Default 80 lines.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "task_id": "<task_id>"
    },
    "name": "get_task_stdout_tail"
  }
}

Input Schema

NameRequiredDescriptionDefault
linesNoTail line count (default 80, max 200)
task_idYesTask ID

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.5.0

TDQS

A3.9/5.0
Behavior4/5

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

Without annotations, the description carries the full burden. It discloses key behaviors: real-time reading during execution, fallback to result.md after completion, and default line count. This is transparent beyond the schema.

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

Conciseness4/5

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

The description is concise with three sentences: purpose, behavior, and usage states. It is front-loaded and contains no fluff.

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?

Given the tool's simplicity, schema coverage, and lack of output schema, the description covers essential behavioral context (states, fallback, default). It is adequately complete for a tail-read tool.

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

Parameters3/5

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

Schema coverage is 100%, with both parameters described. The description adds the default value (80) which is already in the schema. Thus, the description provides minimal additional meaning over the schema.

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

Purpose4/5

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

The description clearly states the tool reads the last N lines of agent stdout/stderr, specifying the action and resource. However, it does not differentiate from sibling tools like get_task_log_tail, which may have similar functionality.

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?

The description provides context on when it works (pending, running, completed tasks) and mentions the fallback behavior. It lacks explicit when-not-to-use or alternative tools, but the guidance is sufficient for typical usage.

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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