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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered. The description adds only the result ordering (most recently updated first) as behavioral context; pagination, cursor behavior, and page-size limits are left entirely to the schema, so the added value beyond structured data is modest.

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 tight sentence that front-loads the resource and scope, then the ordering, then the routing hint. No filler, no restatement of the title.

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, parameterless-required list tool with a fully described schema and no output schema, the description covers what the tool returns (account projects, recency order) and why you'd call it. It stops short of describing return fields or pagination mechanics, but the schema's nextCursor references carry that load.

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 each parameter already documents itself thoroughly (cursor semantics, default/max limit, filtering behavior). The description adds no parameter meaning beyond that, so the baseline 3 applies.

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 and resource ('The authenticated account's projects'), specifies the result ordering ('most recently updated first'), and explicitly positions itself relative to the sibling get_project by noting it is how you obtain an id. An agent can distinguish it from get_project and the other list_* siblings immediately.

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 trailing clause routes the agent to get_project, implying this is the discovery step before a by-id lookup. There is no explicit when-not guidance (e.g., versus list_folders or a name-search path), but the context is clear enough to select correctly.

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