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

Annotations already declare the mutation profile (readOnly=false, destructive=false, idempotent=false, openWorld=false), so the safety surface is covered. The description adds the scope requirement, which annotations do not carry, but says nothing about duplicate-link behavior despite idempotentHint=false being an ambiguity an agent would want resolved.

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 short sentences, front-loaded with the action and followed by the permission prerequisite. No filler, though the brevity comes at the cost of context.

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 two-parameter association mutation with no output schema, annotations already cover safety and the schema covers parameters, so the description is minimally sufficient. It is missing anything about duplicate handling or the result of a successful link, which an agent would need to invoke confidently.

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% and both parameters are documented (UUID formats for asset_id and project_id), so the schema carries the parameter burden. The description adds no syntax, ordering, or format detail beyond it, which is the baseline for a fully-covered schema.

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 ('Link') and resource pair (asset to project), which usefully disambiguates it from the many create_asset_* siblings that create entity records rather than associations. It does not, however, explicitly name the sibling it differs from (create_asset, create_project_infrastructure_asset).

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 only usage guidance is a prerequisite ('Requires project_assets:write scope'). There is no when-to-use context, no mention of alternatives such as delete_project_asset or list_project_assets, and no statement about what happens if the link already exists.

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