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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered; the description reinforces read-only and adds that results are paginated and what metadata comes back. It stops short of stating total counts or ordering/version semantics.

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, zero filler, with the resource and returned fields front-loaded and the alternative pointer at the end where routing decisions belong.

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?

With no output schema, the description usefully enumerates the returned field set, which is the key gap it must fill. What remains missing is pagination mechanics (defaults, max, ordering) for the two undocumented parameters.

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 only 33% (projectId documented, page/limit bare), so the description would ideally explain pagination behavior. It says 'Paginated' but gives no defaults, limits, or ordering, leaving page/limit semantics entirely to the schema defaults.

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 (Paginated list) plus resource (architecture diagrams in Design module) and it enumerates the returned fields (name, type, version, counts, parent). The closing sentence names the sibling get_diagram and the differentiator (full semantic graph).

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?

It explicitly routes the agent to get_diagram when a single diagram's full graph is needed, which is a clear alternative condition. It does not state when listing is inappropriate (e.g., searching by name) or mention other list siblings like list_designs.

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