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

The description is consistent with readOnlyHint:true and openWorldHint:false, and 'inspection' signals no mutation. It adds the scope of what is read but does not disclose potential limits like file-size restrictions, authentication needs, or response format. Because annotations already cover the read-only safety profile, the description meets the baseline but adds limited extra behavioral context.

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?

The description is a single, front-loaded sentence with the tool's role followed by an enumerative list of inspection targets and a category tag. It contains no filler, though the phrase 'PDF Inspector' slightly duplicates the title annotation.

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-input, read-only inspection tool, the description is largely sufficient: it names the input type, the operation, and the main output categories. However, since there is no output schema and several overlapping PDF-analysis siblings exist, a brief note on where this tool fits among them would make it fully self-sufficient.

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 only parameter, file, is fully documented in the schema as 'Input file (PDF)' with binary format. The description repeats the PDF context but contributes no additional constraints or format details. With 100% schema description coverage, a baseline score of 3 is appropriate.

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 identifies a specific function—deep inspection of a PDF—and enumerates concrete deliverables (page count, fonts, annotations, form fields, embedded files). It clearly places the tool in the analysis category, though it does not explicitly distinguish it from overlapping PDF-analysis siblings like pdf_file_info or pdf_page_count.

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 [category: analyze] tag and the 'deep inspection' phrasing imply the tool is for broad read-only analysis of a PDF. However, the description provides no explicit guidance on when to use this tool instead of alternatives such as pdf_page_count, pdf_file_info, or analyze_metadata, and gives no when-not-to-use conditions.

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