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

Annotations already declare this is a non-read-only, non-destructive, non-idempotent write, so the safety bar is partly covered. The description adds genuine context beyond them: cross-project ids are rejected for safety, undefined suiteId falls back to the project's first suite, and the receipt echoes suiteId/storyId/assigneeId. It stops short of saying what happens on a repeat call (duplicate vs. dedupe).

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?

Purpose comes first, then a dense but well-ordered Required/Optional inventory with defaults inline — no filler sentences. It reads as one long block, though every clause carries information.

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?

For an 11-parameter mutation with no output schema, the description covers defaults, validation behavior, and partial return shape, which is most of what an agent needs. Gaps are duplicate-handling semantics, permission/auth expectations, and any routing hint against the sibling create_test_case_from_ac.

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 only 36%, so the description has to carry the load and does: it names every parameter, gives storyId's two accepted formats, explains the suiteId fallback, documents the steps item shape as { action, expected }, and lists the full enums with defaults (including the INTEGRATION default for type, which the schema itself omits).

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?

Opens with a specific verb+resource ("Create a test case in a Stride project") and immediately enumerates the fields it writes, so an agent knows exactly what it produces. It does not, however, distinguish itself from the sibling stride.create_test_case_from_ac, which an agent could easily confuse with it.

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 required/optional split and the defaults (suiteId, priority, type, status) give implicit guidance on what a minimal call looks like. But there is no explicit when-to-use statement, no exclusion of create_test_case_from_ac, and no prerequisites such as permission or project-state requirements.

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