postTestRuns

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

With no annotations, the description must disclose behavioral traits. It only says 'creates' without detailing side effects, permissions, idempotency, error handling, or whether the created runs are immediately active. This is insufficient for a mutation tool.

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 a single, concise sentence. It is front-loaded with the key action. However, for a tool with complex parameters, slightly more explanation would not detract from conciseness.

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?

The tool creates test runs but does not describe return values (e.g., IDs of created runs) or behavior. Given the nested schema and lack of output schema, the description is incomplete. It does not cover important aspects like validation or default values.

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 coverage is 100%, so parameters are documented structurally. The description adds no additional meaning beyond the schema. The baseline of 3 is appropriate, as the schema does the heavy lifting but the description could have provided higher-level context (e.g., the purpose of nested fields).

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 states 'Creates a list of Test Runs,' which clearly indicates the action (create) and the resource (test runs). It is distinct from sibling tools like getTestRuns (retrieve) and deleteTestRuns (delete), though it could be more specific about what 'list' entails.

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?

No guidance is provided on when to use this tool over alternatives (e.g., postTestRuns vs. patchTestRuns for modifying existing runs). There is no mention of prerequisites, context, or when not to use it.

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