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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description's only added behavioral signal is the per-user scoping ('authenticated user belongs to'), which is genuinely useful for deciding what will be returned. It omits any note on volume, ordering, or pagination behavior.

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 short sentence with no wasted wording, and the key scoping fact is present up front. Nothing extraneous and nothing structurally confusing.

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-parameter read-only list tool with annotations covering safety and no output schema, the description is adequate but thin. It does not say whether results include archived/owned-only projects, how they are ordered, or whether the list is bounded, which an agent may need in order to plan a follow-up call.

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?

The tool takes zero parameters, so the baseline is 4 and there is nothing in the schema for the description to compensate for. No parameter-level semantics are needed.

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?

The description gives a specific verb (List) and resource (projects) plus a scoping qualifier ('the authenticated user belongs to'), which meaningfully separates it from create_project, list_project_baselines, and get_project. It stops short of explicitly contrasting itself with sibling list/read tools, so a 4 rather than 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?

There is no explicit when-to-use guidance, no mention of alternatives such as joining/leaving a project, and no statement about when another tool (e.g. get_project for a single project) would be preferable. At best the usage is implied by the name 'my_projects'.

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