wireshark_open_file

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

With no annotations, the description fully carries the behavioral burden. It explains the tool analyzes the file, detects protocols, recommends tools, and importantly states it does 'not mutate the MCP tool surface mid-session'. This is good transparency.

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 well-structured with labeled sections (Entry Point, explanation, Args, Returns, Example). It is concise yet informative, though the sentence about 'All contextual tools remain available' could be slightly more integrated.

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 an entry-point tool, the description covers its role, input format, expected output, and an example. With an output schema present, it does not need to detail return values. It also clarifies non-mutating behavior, making it complete.

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?

Although the schema provides no property descriptions (0% coverage), the description compensates by documenting the parameter 'pcap_file' as 'Path to the capture file (.pcap, .pcapng, etc.)', adding format details beyond the schema type.

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 it opens a pcap file and recommends relevant analysis tools, explicitly identifying itself as the 'recommended FIRST tool to call'. This distinguishes it from sibling tools that perform 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 explicitly recommends this as the first tool to call and notes that other tools remain available throughout the session. It does not specify when to avoid using it, but the entry-point role is clear.

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