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

Annotations already declare readOnlyHint=true, but the description adds a real behavioral fact beyond them: the required permission scope 'projects.read'. It also discloses which fields come back, which matters since there is no output schema. Minor gap: no statement about behavior for a missing/invalid project id.

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, front-loaded sentences with no filler – action and payload first, the permission requirement second. Nothing redundant.

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 single-entity read with no output schema, the description covers purpose, returned fields, and auth scope. The only real omission is any guidance on the single required parameter and on not-found behavior.

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?

There is exactly one parameter and it is completely undocumented: schema coverage is 0% and the description never mentions project_id, its integer type, or where to obtain it. Even for an obvious id field, this leaves the only input entirely to inference.

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?

Names a specific verb ('Read') and resource ('one project'), plus enumerates the notable returned fields (customer/status/value) so the agent knows this is a full-record fetch. It's implicitly distinct from builderprime_list_projects via 'one project', though it never names the sibling explicitly.

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 singular 'one project' hints at the read-one-vs-list distinction, and 'Requires projects.read' gives a precondition, but there is no explicit when-to-use/when-not or reference to builderprime_list_projects or builderprime_update_project as alternatives.

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