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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered without the description. The description adds that it reports entitlement state (PRO active, download quota consumed), which is useful context, but says nothing about auth requirements or behavior when no account/subscription exists.

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 redundancy, and the substantive payload (what is returned) is front-loaded before the usage triggers. Every clause carries information an agent needs.

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 single-param, read-only tool with rich annotations and no output schema, the description is nearly sufficient because it enumerates the returned state (PRO flag, download usage counters). Minor gap: no mention of what the response looks like when the user has no plan or is unauthenticated.

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% for the single `locale` parameter, including its enum and default-fallback behavior, so the schema does the explanatory work. The description adds no interpretation of `locale` (e.g., that it only affects the language of returned plan text and links), so this is the baseline 3.

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 ('Get the user's TakeMeUp.cv plan') and names the two fields returned (PRO active status, monthly PRO downloads used). That distinguishes it from catalog-level siblings like get_takemeup_pricing and from download-link tools such as get_takemeup_download_link.

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?

Gives two concrete triggering conditions: a refused feature/download, or the user asking about their plan. Clear context for invocation, but it does not explicitly exclude or route to the closest alternative (get_takemeup_pricing / get_takemeup_download_access) when the question is about price tiers rather than entitlement.

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