Lyngdorf MCP Server

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

No annotations are provided, so the description carries full burden. It mentions the tool toggles playback (like 'play'), which adds some behavioral context, but fails to disclose critical traits: whether it requires specific device states, how it interacts with streaming sources, error conditions, or response behavior. For a mutation tool with zero annotation coverage, this is inadequate.

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?

The description is extremely concise (two short sentences) and front-loaded with the core purpose. Every sentence adds value: the first states the action, and the second clarifies behavior and context. No wasted words.

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 tool's complexity (a mutation with no annotations or output schema) and sibling tools like 'play' and 'mute', the description is incomplete. It lacks details on prerequisites (e.g., requires active playback), effects (e.g., what 'toggles' means precisely), and error handling. For a control tool in a rich audio system, more context is needed.

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?

The tool has 0 parameters, and schema description coverage is 100%, so no parameter documentation is needed. The description doesn't add param info, which is fine here. Baseline is 4 for zero parameters, as it avoids unnecessary details.

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?

The description clearly states the tool's purpose: 'Pause music playback' with the specific verb 'pause' and resource 'music playback'. It distinguishes from siblings like 'play' by noting it's 'same as play - it toggles', though this could be clearer. It doesn't fully differentiate from 'togglePower' or other control tools.

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?

The description implies usage context with 'Works with streaming sources', suggesting when it applies, but lacks explicit guidance on when to use this vs. alternatives like 'play' (which it mentions as similar) or 'mute'. No exclusions or prerequisites are stated.

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