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analyze_pcap_file

Read-onlyIdempotent

Analyze network packet captures from PCAP files using display filters to troubleshoot issues or extract traffic patterns.

Instructions

Analyze a PCAP file with optional display filters.

Args: filepath: Path to PCAP/PCAPNG file display_filter: Wireshark display filter (e.g., 'http', 'ip.addr == 10.0.0.1') max_packets: Maximum number of packets to analyze

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
filepathYes
display_filterNo
max_packetsNo
Behavior3/5

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

Annotations already declare readOnlyHint=true, destructiveHint=false, idempotentHint=true, openWorldHint=true. The description adds that the tool analyzes with optional display filters, which is consistent. No additional behavioral context beyond annotations, but annotations are rich, so the bar is lower. No contradiction found.

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?

The description is extremely concise: one sentence for purpose and three bullet points for parameters. No extraneous text. All information is front-loaded and relevant. Every sentence earns its place.

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

Completeness3/5

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

The description is adequate for a tool with good annotations, but lacks output description. Since there is no output schema, the agent does not know what 'Analyze' returns. Additionally, the description does not clarify scope (e.g., summary vs full analysis) or differentiate from similarly named siblings. Parameters are well-covered, but overall completeness is moderate.

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

Parameters4/5

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

Schema description coverage is 0%, so the description must compensate. It explains filepath (path to pcap file), display_filter with an example ('http', 'ip.addr == 10.0.0.1'), and max_packets with its default value (10000). This adds meaningful context beyond the schema titles, though could include more detail like file format support.

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

Purpose4/5

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

The description clearly states 'Analyze a PCAP file with optional display filters.' The verb 'Analyze' and resource 'PCAP file' are specific. However, it does not distinguish from closely related sibling tools like analyze_large_pcap or deep_packet_analysis, which also analyze pcap files.

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?

The description provides no guidance on when to use this tool versus alternatives. It does not mention prerequisites, limitations, or give explicit when-to-use or when-not-to-use context. Sibling tools like analyze_large_pcap or deep_packet_analysis exist but no differentiation is provided.

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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