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discohead

textual-mcp-server

by discohead

textual_check_errors

Read-only

Detect collected errors and app exceptions in a Textual TUI session to quickly identify and resolve application issues.

Instructions

Check for collected errors and app exceptions.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
session_idYes
clearNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

Annotations already indicate readOnlyHint=true and destructiveHint=false. Description adds minimal behavioral context (type of data checked) but not side effects, rate limits, or response behavior.

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

Conciseness3/5

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

Single sentence is concise but lacks detailed structure. Could be improved by front-loading key usage hints without adding length.

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?

Given the tool's simplicity and presence of output schema, the description covers the basic purpose but omits important details like what 'check' returns or effect of clearing errors.

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

Parameters1/5

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

Schema has 0% description coverage, and the description provides no information about the two parameters (session_id, clear) or their usage. Agent receives no guidance beyond raw 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?

Description states 'Check for collected errors and app exceptions,' clearly identifying the tool's function (verb 'check' with resource 'errors and exceptions'). It distinguishes from sibling tools which focus on interaction or navigation.

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 guidance on when to use this tool versus alternatives or when not to use it. Lack of context on prerequisites or appropriate scenarios.

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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