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 behavioral context beyond that: the output is an A4 PDF returned as base64, and it discloses the input precondition. This is useful detail the annotations do not convey.

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?

Three tightly packed sentences: purpose, requirement, and output contract. Every sentence earns its place and the core purpose is front-loaded in the first clause.

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 nested-object tool with 0% schema coverage and an output schema, the description covers purpose, input precondition, template choice, and return format. The remaining gap is per-field semantics for nested entries, but those field names are largely self-describing and return values are handled by the output schema.

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 0%, so the description must carry parameter meaning, and it does so only partially. It names the top-level resume sections and the three template values (clean, modern, compact), but adds no semantics for the nested fields (email, phone, bullets, dates) beyond the property names already visible in the 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 (Build) and resource (resume PDF) and enumerates the exact inputs it consumes (profile, experience, education, skills). No sibling in the list produces a resume, so an agent can identify it 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?

It states a validation prerequisite (a name plus at least one experience/education/skills entry) and the template options, which implies the required usage context. However, there is no explicit when-to-use guidance, no exclusions, and no routing to alternatives.

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