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

Annotations already declare readOnlyHint, idempotentHint, and openWorldHint=false, so safety is covered. The description adds 'Free', a cost/credit cue that annotations do not express — genuine value beyond structured fields. 'read-only' is redundant with the annotations, preventing 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?

A single compact sentence front-loads the action and resource, then tacks on return fields and cost. Nothing wasted.

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-param, no-output-schema list tool, the description covers purpose, returned fields, and cost. 'activity' is left vague and there is no pagination note, but the essentials an agent needs to call it are present.

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?

Zero parameters, so the baseline is 4. The description instead documents the return shape (id, title, activity), which is useful given there is no output 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 ('List') plus resource ('the user's Cinegenta projects') and even names the returned fields (id, title, activity). The contrast with create_project is implicit but obvious from the verb; it doesn't explicitly route to sibling tools, keeping it just short of a 5.

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?

'Free, read-only' implies this can be called liberally without cost or side effects, which is useful usage context. However, it gives no explicit when-to-use or alternatives among siblings (e.g. vs. get_status or create_project).

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