beta_testers__list

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the behavioral safety is clear. The description adds minimal extra behavioral context (just the HTTP method and endpoint), but with strong annotations the bar is lower. No contradictions exist.

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 brief sentences including the URL). Every word is necessary and no filler exists. It's front-loaded with the core action and resource.

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 complexity of 13 parameters and no output schema, the description is somewhat lacking. It doesn't explain return values or common usage patterns. However, the strong annotations and fully described schema parameters partially compensate. An agent might need to infer pagination and filtering behavior from parameter names alone, which could be better explained.

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?

Schema description coverage is 100%, so every parameter has a description. The tool's description does not add any extra meaning beyond the schema; it relies entirely on the structured field descriptions. Baseline is 3 because the schema does the heavy lifting, and the description adds no compensation for the lack of richer param context.

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 'List beta testers' with the resource and action, and the URL path [GET /v1/betaTesters] reinforces it. It sufficiently distinguishes itself from siblings like beta_testers__get or beta_testers__create, though it does not explicitly differentiate from other list 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 itself provides no guidance on when to use this tool vs alternatives or any context about prerequisites. However, the annotations (readOnlyHint, idempotentHint, destructiveHint) imply it is safe for read-only queries, and the parameter schema includes filtering and pagination hints that an experienced agent could infer usage. An explicit usage note is missing.

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