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websex_checksec

Run binary hardening checks in WebSex engagements via direct argv execution and no shell parsing, reporting NX, PIE, RELRO, canaries, and Fortify.

Instructions

Run checksec from the WebSex binary toolkit. The container executes checksec 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

B3.2/5.0
Behavior3/5

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

With no annotations, the description carries the disclosure burden, and it does add genuine behavioral context: the container execs checksec directly with argv tokens and never invokes a shell, which tells the agent how arguments are passed. It still omits anything about failure modes, required engagement state, or permission constraints.

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 core action, and each adds a distinct operational fact. No filler or redundancy.

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 are covered, but with zero annotation coverage and four undocumented parameters the description should do more: stdin is unexplained and there is no note on the engagement_id format or how arguments should be shaped. Adequate but with evident gaps.

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 implicitly maps 'supplied argv tokens' to arguments, 'engagement namespace' to engagement_id, and 'relative paths' to working_directory, but never names them and says nothing about the stdin parameter.

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?

States a specific verb (Run) and resource (checksec from the WebSex binary toolkit), which is enough to identify it among the many binary-analysis siblings. It does not explain what checksec verifies (RELRO/canary/NX/PIE) nor explicitly contrast with siblings like websex_file or websex_objdump, but the named tool is distinctive.

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 reach for checksec versus the other binary-analysis tools (ghidra, objdump, strings, file). The only directives given are operational (engagement namespace, relative paths), not selection criteria or preconditions.

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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