REAPER MCP Server

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

With no annotations provided, the description carries the full burden and performs well. It discloses the computationally expensive 'Render' operation, specifies the exact detection threshold (0 dBFS), and documents the return structure (count, peak dB, boolean) since no output schema exists.

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

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

Two sentences with zero waste: first establishes the action and domain, second documents return values. Perfectly front-loaded and appropriately sized for a parameterless tool.

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

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

Given the lack of output schema, the description admirably compensates by detailing the return values. For a simple detection tool with no parameters, this is complete, though it could optionally clarify if the render creates a temporary file or affects project state.

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

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

Zero parameters are present (schema coverage 100%), establishing baseline 4 per rubric. No parameter description is required or expected.

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

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

States specific actions (render, detect) and target resource (digital clipping/samples at 0 dBFS). The scope is precisely defined, distinguishing it from generic render_project and broader analysis tools like analyze_loudness or analyze_dynamics in the sibling list.

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

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

Usage is implied by the specific domain (detecting clipping at 0 dBFS), but there is no explicit guidance on when to choose this over render_project or analyze_loudness. No alternatives or prerequisites are mentioned.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.