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Glama

rec_stop

Idempotent

Stop an active TwinCAT signal recording, release ADS notifications, and finalize the output file. Returns recording status and statistics for analysis.

Instructions

Stop a recording, release the ADS notifications, finalize the file; returns status + stats.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
idYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.6.0

TDQS

B3.4/5.0
Behavior4/5

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

Annotations already declare it is non-read-only, idempotent, and non-destructive. The description adds meaningful side effects beyond that: releasing ADS notifications and finalizing the file, plus noting that status and stats are returned.

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?

A single sentence, front-loaded with the primary action and semicolon-separated details. Every clause adds relevant information without waste.

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?

The tool is simple (one parameter) and has an output schema to cover return values, so the description does not need to explain them. Annotations cover safety and idempotence. The main gap is the unexplained 'id' parameter, but otherwise the description is complete for this complexity.

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

Parameters2/5

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

Schema description coverage is 0% for the single required parameter 'id'. The description never explains what the id refers to or how to obtain it, so it fails to compensate for the undocumented parameter.

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?

States a specific verb ('Stop') and resource ('a recording'), plus additional effects (release ADS notifications, finalize file). It does not explicitly differentiate from sibling tools such as rec_profile_stop, so it falls short of a 5.

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

Usage Guidelines2/5

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

The description gives no when-to-use guidance, prerequisites, or alternatives to consider. The context implies use on an active recording, but nothing is stated about when not to use it or how it relates to rec_start or rec_profile_stop.

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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