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

Annotations already mark this as read-only, so the safety profile is covered. The description adds the project-context requirement and the includeUsageCounts behavior, but does not disclose response shape, pagination, or how versionId absence behaves. This is acceptable for a simple read-only list but not rich.

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?

Two sentences with no filler. The main purpose is front-loaded, the optional flag behavior is explained, and the project-context prerequisite is stated. Every sentence earns its place.

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 a simple read-only list operation with three well-documented parameters and no output schema, the description covers the core need. The only minor gap is that 'Requires project context' is left unexplained, but this is likely platform-wide and the schema handles the rest.

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 three parameters are already documented. The description adds a small amount of value by explaining the purpose of includeUsageCounts ('to see how often each is referenced'), but it does not go beyond the schema for specId or versionId.

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 uses a specific verb ('List') with a clear resource ('security schemes') and scope ('a spec version defines'), and explicitly names the OpenAPI location (components/securitySchemes). This cleanly distinguishes it from sibling get_security_scheme_component and 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 conveys its intended use: listing security schemes for a spec version. It includes a prerequisite ('Requires project context') but does not explicitly state when to prefer this over alternatives such as get_security_scheme_component or how to establish project context.

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