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Cleat

by so.cleat
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List messages

list_messages

Texts received by one line, newest first.

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": {
      "lineId": "<lineId>"
    },
    "name": "list_messages"
  }
}

Input Schema

NameRequiredDescriptionDefault
limitNoHow many to return. Defaults to 20.
lineIdYesThe line's id, from list_lines.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

B3.2/5.0
Behavior3/5

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

With no annotations, the description carries the full behavioral burden, and it does disclose two useful traits: only received (inbound) texts are returned, and results are ordered newest first. It does not cover pagination or the read-only nature, so the coverage is partial rather than rich.

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?

A single tight sentence with no filler, and the scoping constraint plus ordering are front-loaded. It is efficient, though its brevity is close to the point of under-specification rather than maximal helpfulness.

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

Completeness3/5

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

For a simple read-only list tool with fully documented parameters, the definition is adequate. However, with no annotations and no output schema, an agent gets no signal about the return shape or pagination behavior, leaving a modest gap.

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 description coverage is 100%, so both lineId and limit are already documented in the schema. The description reinforces that the query is scoped to one line but adds no format, range, or default details beyond what the schema states.

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?

"Texts received by one line, newest first" names the resource (messages/texts), the scoping dimension (a single line), and the sort order. It is clearly distinguishable from siblings like latest_code (a single code) and list_lines (the lines themselves), though it never names an alternative explicitly.

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?

No when-to-use or when-not-to-use guidance is given. The phrase "by one line" implies the tool is scoped to a single line, but there is no statement of prerequisites or of how this differs from reaching for latest_code or wait_for_code.

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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