pcap_overview

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

With no annotations provided, the description carries the full burden and does well by disclosing key behavioral traits: it's read-only, involves file analysis (not network access), and specifies the return values (protocol_hierarchy, endpoints, packet_count, capture_info). It doesn't mention error handling or performance limits, but covers essential safety and scope.

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 front-loaded with the core purpose, followed by return values and behavioral notes in two concise sentences. Every sentence adds value without redundancy, making it efficient and easy to parse.

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?

Given no annotations and no output schema, the description compensates well by specifying return values and behavioral constraints. It's complete enough for a read-only analysis tool, though it could benefit from mentioning error cases or input format requirements to reach a perfect score.

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 input schema has 100% description coverage, with pcap_path clearly documented. The description adds no additional parameter semantics beyond what's in the schema, so it meets the baseline of 3 for adequate but not enhanced parameter information.

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 clearly states the tool's purpose with specific verbs ('Get protocol hierarchy and endpoint statistics') and resources ('from a PCAP'), distinguishing it from sibling tools like pcap_detect_scan or pcap_dns_analysis by focusing on overview statistics rather than specific analyses.

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 description implies usage context through 'Read-only file analysis, no network access,' suggesting it's for offline PCAP analysis, but it doesn't explicitly state when to use this tool versus alternatives like pcap_extract_credentials or pcap_follow_stream, leaving the agent to infer based on the purpose.

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