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Onda MCP

Onda MCP

by mindfullabai
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
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onda_terminal_send_keys

Send special key sequences (Ctrl+C, arrows, F1-F12) to a terminal for tmux-like control. Maps semantic key names to stdin bytes, with raw text fallback for other input.

Instructions

Send semantic key sequences to a terminal (Ctrl+C, Up, Enter, Esc, F5, Tab, ...). Each entry in keys is mapped to the appropriate stdin bytes. Supports Ctrl+, Arrow keys, Function keys F1-F12, Enter/Tab/Esc/Backspace/Delete/Home/End/PageUp/PageDown/Insert/Space, and raw literal text as fallback. Use this for tmux-like control instead of onda_terminal_send when you need to type special keys.

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": {
      "id": "<id>",
      "keys": "<keys>"
    },
    "name": "onda_terminal_send_keys"
  }
}

Input Schema

NameRequiredDescriptionDefault
idYesTerminal ID to send to.
keysYesOrdered list of key names. Example: ["Ctrl+C"], ["Up", "Up", "Enter"], ["Esc", ":wq", "Enter"].

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.3.2

TDQS

A4.7/5.0
Behavior4/5

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

With no annotations provided, the description carries the full burden. It discloses that each key entry is mapped to stdin bytes, supports a wide range of special keys, and falls back to raw literal text. This sufficiently conveys the tool's behavior for a non-destructive input operation, though it does not mention any potential side effects or blocking behavior.

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?

The description is two sentences, front-loaded with the core purpose, followed by supported keys and an explicit alternative. Every sentence earns its place, and the structure is highly scannable.

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

Completeness5/5

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

For a key-sending tool with two well-documented parameters and no output schema, the description provides sufficient context: what it does, what keys it supports, and when to use it instead of the sibling tool. It is complete for the tool's complexity.

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

Parameters4/5

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

Schema coverage is 100%, so baseline is 3. The description adds semantic value by explaining that 'Each entry in `keys` is mapped to the appropriate stdin bytes' and listing supported key categories, which complements the schema's example-based parameter descriptions.

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

Purpose5/5

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

The description clearly states the tool's function with a specific verb and resource: 'Send semantic key sequences to a terminal.' It also distinguishes itself from the sibling tool onda_terminal_send by specifying 'Use this for tmux-like control instead of onda_terminal_send when you need to type special keys.'

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

Usage Guidelines5/5

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

Explicit usage guidance is provided, including when to use this tool over the alternative: 'Use this for tmux-like control instead of onda_terminal_send when you need to type special keys.' The description also enumerates supported key types, making the scope clear.

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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