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websex_pwninit

Patch ELF binaries to use a supplied libc and loader, preparing exploitation targets within a selected engagement namespace.

Instructions

Run pwninit from the WebSex binary toolkit. The container executes pwninit directly with the supplied argv tokens; shell parsing is never used. Runs from the selected engagement namespace; use relative paths for engagement artifacts.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
stdinNo
argumentsYes
engagement_idYes
working_directoryNo.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

C2.9/5.0
Behavior3/5

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

With no annotations the description carries the full burden. It usefully discloses the execution model ('executes `pwninit` directly with the supplied argv tokens; shell parsing is never used') and the namespace/working-dir behavior, but omits key behavioral facts: pwninit mutates/writes patched binaries, typically requires a libc/loader argument, and there is no statement about permissions or side effects.

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

Conciseness4/5

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

Three short sentences, front-loaded with the action and execution detail, with no filler. Efficient, though the sentences could be tightened further given how little functional information they carry.

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?

An output schema exists, so return values need not be described. However, for a 4-parameter tool with no annotations and 0% schema coverage, the description should do more: it never explains pwninit's actual effect on files or what a valid invocation looks like, leaving the agent with execution mechanics but not tool semantics.

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 description coverage is 0%, so the description must compensate. It adds meaning for 'arguments' (argv tokens, no shell parsing), 'engagement_id' (selected engagement namespace), and 'working_directory' (relative paths for artifacts), but leaves 'stdin' entirely unexplained and gives no format guidance for the argv tokens pwninit expects.

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

Purpose3/5

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

States a specific verb+resource ('Run pwninit') and identifies it as part of a binary toolkit, but 'Run pwninit' largely restates the tool name and never explains what pwninit actually does (e.g. patching ELF binaries against a supplied libc/loader). An agent unfamiliar with pwninit cannot distinguish it functionally from siblings like websex_pwntools or websex_checksec.

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 gives environmental context (engagement namespace, relative paths) but no when-to-use or when-not-to-use guidance, and never contrasts pwninit with the many other binary/reversing siblings. Nothing tells the agent which situation selects this tool over websex_pwntools or websex_ropgadget.

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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