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

Annotations already establish readOnly, idempotent, non-destructive, and closed-world behavior. The description adds real value beyond that by disclosing the two corpora searched and the relative breadth versus find_similar_projects, which is behavioral context the annotations cannot convey. It stops short of describing result shape or ordering, 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?

Front-loaded with the core action and scoping, and each sentence contributes something (scope, sibling contrast, domain, motivation). It is slightly list-like in the colon construction but waste-free overall.

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 read-only, one-parameter search tool with full annotation coverage and no output schema, the description covers what is searched and why. The main remaining gap is that 'looks similar' is never qualified (semantic vs. keyword matching, ranking, or result volume), which an agent would benefit from knowing.

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?

Only one parameter with 100% schema description coverage ('One-paragraph project idea or capability description'), so the schema already carries the semantics. The description restates it as 'project/proposal idea' without adding format, length, or quality guidance, which is the expected baseline when the schema does the work.

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+resource ('find existing Canton ecosystem projects + dev-fund proposals that look similar') and immediately scopes it to BOTH the dev-fund proposals corpus and ecosystem_projects. It explicitly distinguishes itself from the sibling find_similar_projects, so an agent can pick between them without opening either 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?

Gives clear context ('Cuts manual cross-reference research before submitting a new proposal') and names an alternative (find_similar_projects) with the condition that separates them. It does not address the overlap with other siblings like find_duplicate_proposals, so exclusions are partial rather than complete.

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