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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so safety is covered. The description adds genuine value on top: it discloses that anonymous in-progress sessions are included and that a new account yields an empty list, which pre-empts a false 'no CVs exist' conclusion. Pagination/ordering is unstated, keeping it below 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?

Two sentences, no filler: contents and scope first, then the routing directive, then the empty-state caveat. Every clause carries information an agent would otherwise have to guess.

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 one-parameter read-only list tool with no output schema, the description fully compensates by enumerating returned fields and documenting the empty-list edge case. Nothing needed to invoke it correctly is missing.

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 single optional parameter (locale) has 100% schema description coverage including the default behavior, so the schema does the work. The description never mentions locale or how language affects titles and editor links, so it adds nothing beyond the schema — 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 ('List the user's CVs (resumes) on TakeMeUp.cv') and enumerates the fields returned (id, title, template, country format, status, editor link), so the agent knows exactly what comes back. The parenthetical about an in-progress anonymous session further scopes which CVs appear, distinguishing it from get_takemeup_cv.

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?

'Use first in almost every task, to find the CV to work on' gives clear entry-point guidance that routes the agent before it reaches for get_takemeup_cv or update tools. It stops short of naming the sibling to call after obtaining an id, so it is not fully explicit about alternatives.

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