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

Annotations already declare readOnly/non-destructive/non-open-world, so safety is covered. The description adds genuinely useful context beyond that: modules are org-level and shared, the list mirrors the Modules page, pagination is supported, and referencing a module never mutates it.

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?

Three sentences with purpose front-loaded and the cross-reference to test-case creation placed last. Slightly padded by the parenthetical restating the Modules-page equivalence, but nothing is confusing or out of order.

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?

No output schema exists, and the description conveys enough for correct invocation: read-only listing, org scope, search/pagination support, and how ids are consumed. Minor gaps (return shape, default page size) are covered by the schema's parameter docs.

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 all five parameters (page, limit, search, folder_id, include_subfolders) are already documented. The description only mentions search and pagination generically, adding no syntax or semantics beyond the schema, so the baseline 3 applies.

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?

Specific verb + resource ('List the organization's reusable step Modules') with scope defined (org-level, shared across projects, equivalent to the Modules page). No sibling tool lists modules, and the description makes clear this is distinct from folders/projects/test cases.

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?

Gives a concrete downstream use case: reference a module by id when creating or editing a test case. It does not state when NOT to use it or name an alternative, but there is no competing module-listing sibling, so the guidance is clear if not exhaustive.

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