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pcap_analyze

Replay PCAP files through Zeek to generate connection, DNS, HTTP, SSL, and other logs for forensic analysis.

Instructions

Replay a PCAP file through Zeek and return the generated log summary. Creates connection, DNS, HTTP, SSL, and other logs from the packet capture. Useful for forensic analysis of captured traffic.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
scriptsNoAdditional Zeek scripts to load (e.g. 'protocols/ssl/log-hostcerts-only')
filenameYesPCAP filename (from pcap_list) or full path
timeoutSecondsNoAnalysis timeout in seconds
Behavior3/5

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

No annotations are provided, so the description carries full burden. It states that logs are created and a summary is returned, but does not disclose whether state is modified, if there are auth requirements, or if the operation is non-destructive. The behavioral context is adequate but not comprehensive.

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 two sentences with no wasted words. The first sentence front-loads the main action, and the second adds context about the types of logs generated. It is efficient and to the point.

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?

Given no output schema or annotations, the description is reasonably complete. It explains the process (replay through Zeek), the output (log summary), and the types of logs. However, it does not detail the output format or potential limitations, which is acceptable for a tool of moderate complexity.

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

Parameters3/5

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

Schema coverage is 100%, so the schema already describes all three parameters. The description does not add additional meaning beyond what is in the schema; it merely repeats the tool's purpose. Baseline score of 3 is appropriate.

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 states it replays a PCAP file through Zeek and returns a log summary, specifying the verb (replay), resource (PCAP file), and output. Among siblings, this is the only tool that replays PCAPs, distinguishing it from other Zeek tools that query existing logs.

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

Usage Guidelines3/5

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

The description mentions it is useful for forensic analysis, which implies usage context. However, it does not explicitly state when to use this tool versus alternatives, nor does it provide exclusions or prerequisites.

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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