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discohead

textual-mcp-server

by discohead

textual_type_text

Type a string into the currently focused input widget of a Textual TUI application, with an option to submit after typing.

Instructions

Type text into the focused input widget.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
session_idYes
textYes
submitNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

Annotations provide minimal safety hints (non-destructive), but description adds no behavioral context such as whether text is appended or replaces, or how the 'submit' parameter affects the action. The agent lacks insight into side effects.

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?

Single sentence, no unnecessary words. Efficiently front-loaded and minimal.

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

Completeness2/5

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

Given 3 parameters and an output schema (not shown), the description omits crucial details like session handling, submit behavior, and return value. Incomplete for reliable agent invocation.

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?

With 0% schema property descriptions, the description fails to explain the role of session_id, text, or submit beyond their names. No parameter meaning is added beyond the schema itself.

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 verb 'type' and resource 'text into focused input widget', clearly indicating the action. However, it does not explicitly distinguish from sibling 'textual_press' which may have overlapping behavior.

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 like textual_press or textual_click. No context about prerequisites or exclusions is provided.

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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