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bx33661

Wireshark MCP

by bx33661

wireshark_get_file_info

Read-only

Retrieve capture file metadata such as file type, packet count, duration, and size from pcap files.

Instructions

Get capture file metadata (type, packet count, duration, size) via capinfos.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pcap_fileYes
Behavior3/5

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

Annotations already declare readOnlyHint=true. The description adds that the tool uses capinfos and returns metadata, providing minimal extra behavioral context beyond the annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single sentence front-loaded with the key action and result. No filler words, every part serves a purpose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple tool with one parameter and no output schema, the description conveys the essential purpose and output fields. Lacks explicit return format but lists metadata types, which is adequate.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

With 0% schema description coverage, the description carries full burden but only lists the parameter name (pcap_file) without specifying format, constraints, or examples. The description does not compensate for the schema gap.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly specifies the verb 'Get' and resource 'capture file metadata', listing specific fields (type, packet count, duration, size). It distinguishes this tool from siblings that focus on packets, statistics, or capture operations.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool versus alternatives like wireshark_open_file or wireshark_quick_analysis. The description mentions 'via capinfos' but does not explain context for choosing this tool.

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

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