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mcp-security-scanner

by badchars

rt_verify_pins

Verifies tool integrity by hashing current tool definitions and comparing against a stored pin to detect added, removed, or modified tools, flagging potential rug pulls.

Instructions

Connect to server, hash current tool definitions, compare against stored pin. Reports: added tools, removed tools, modified tools (hash changed — potential rug pull), unchanged tools.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
commandYesServer command to execute (e.g. 'node', 'bun', 'npx')
argsNoCommand arguments (e.g. ['run', 'server.js'])
envNoAdditional environment variables
timeout_msNoConnection timeout in milliseconds (default: 30000)
pin_nameYesPin name to verify against
Behavior4/5

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

No annotations are provided, so the description carries the full burden. It describes connecting, hashing, comparing, and reporting changes, including a warning about 'potential rug pull'. However, it does not mention error handling, permissions, or whether the operation is read-only.

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?

Three concise sentences with front-loaded action. No wasted words; every sentence adds value.

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?

Despite no output schema, the description explains return categories (added, removed, modified, unchanged). Minor gaps: timeout semantics (connection vs total operation) and output format details are missing. Overall sufficient for a verification tool.

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 baseline is 3. The description adds minimal value beyond schema—it implies using command/args/env to connect but does not elaborate on formats, defaults, or edge cases. The pin_name parameter is mentioned in context.

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 the verb (verify), resource (pins via comparing tool definitions), and the output (reports of changes). It distinguishes itself from siblings like rt_pin_tools and rt_check_tool_poisoning by focusing on verification.

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 implies usage for verifying tool integrity against a stored pin but does not explicitly state when to use this tool versus alternatives like rt_pin_tools or rt_check_tool_poisoning. No when-not or context exclusions are 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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