analyze_sip_packets

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

No annotations provided, so description carries full burden. It discloses file upload limitations, supported formats, and return type. Could mention error behavior (e.g., invalid file) but overall sufficient for a read-only analysis tool.

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?

Well-structured with sections and examples. Slightly verbose but every sentence adds value. Could condense the file upload limitation into one concise statement.

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?

Single parameter, no annotations, but description covers purpose, input restrictions, and return type. It is complete and actionable for a tool with this complexity.

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 has 0% parameter description coverage, so description must compensate. It specifies 'HTTP URL or absolute local file path' and provides examples, adding critical meaning beyond the raw schema type 'string'.

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?

Description clearly states the tool analyzes SIP packets from a PCAP file and returns structured signaling details. The verb 'analyze' and resource 'SIP packets from a PCAP file' are specific and distinct from siblings (e.g., analyze_dns_packets, analyze_tcp_connections).

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?

Explicitly provides when-to-use guidance: supports remote URLs and absolute local paths. Also specifies unsupported inputs (Claude upload, base64, relative paths) and a key limitation. This helps the agent avoid common errors.

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