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Onda MCP

Onda MCP

by mindfullabai
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Local

onda_terminal_read

Read recent terminal output, including byte totals and timestamps, to see what a terminal printed without subscribing to a live stream. Attaches a passive tap on first call.

Instructions

Read recent output of a terminal (ring buffer ~200 KB / ~1 MB if a listener is attached). Returns the current buffer content plus byte total and timestamps. Use to see what a terminal has printed without subscribing to a live stream. Lazily attaches a passive tap on first call — no impact on the terminal itself.

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>"
    },
    "name": "onda_terminal_read"
  }
}

Input Schema

NameRequiredDescriptionDefault
idYesTerminal ID to read from.
linesNoOptional: cap returned content to the last N lines.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.3.2

TDQS

A4.5/5.0
Behavior5/5

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

With no annotations provided, the description carries full burden and excels: it discloses buffer size (200 KB / 1 MB with listener), return contents (buffer + byte total + timestamps), and the lazy passive tap with no impact on the terminal. This is thorough and honest.

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 compact, front-loaded with the primary action, and every sentence adds value: return contents, use case, and side-effect behavior. No redundant or filler text.

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?

The description fully covers what the tool does, what it returns (buffer content, timestamps, byte total), and its side effects, which is especially important given there is no output schema. It's complete for a simple read operation.

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 coverage is 100%, and both parameters (id, lines) already have clear schema descriptions. The tool description does not add parameter-specific meaning beyond what the schema provides, so the baseline of 3 applies.

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 opens with 'Read recent output of a terminal', clearly stating the verb and resource. It distinguishes itself from sibling tools like subscribe by noting 'without subscribing to a live stream' and describing the passive tap behavior.

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

Usage Guidelines4/5

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

It explicitly says 'Use to see what a terminal has printed without subscribing to a live stream', giving a clear use case. However, it does not explicitly name alternatives or state when not to use it, so it stops short of a 5.

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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