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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is settled. The description adds genuinely new context: what a result record contains and that selection precedes use_template. No output schema exists, and pagination/ordering behavior is unmentioned, which keeps it from a 5.

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, each earning its place: the first defines the resource and payload, the second gives the next action. Front-loaded with the purpose and no redundant restatement of the title.

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 zero-parameter list with no output schema and rich annotations, the description covers purpose, returned fields, and downstream workflow. Only minor details (ordering, whether the list is ever filtered) are absent, and they are unlikely to block a correct call.

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?

The tool takes no parameters, so the baseline is 4. The description correctly implies no input is required rather than inventing filtering options, and nothing in the schema needs compensating for.

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?

States a specific verb and resource ('List the starter templates') plus the scope ('a new project can begin from') and the fields returned (IDs, names, categories). It also positions itself in the workflow relative to use_template, so an agent can tell it apart from that sibling without opening a schema.

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?

Explicitly sequences the tool as a prerequisite: 'Pick one here before calling use_template.' That is clear when-to-use guidance. It stops short of naming exclusions (e.g., when to call get_template for a single template's details instead), so it falls just short of a 5.

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