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MCP SSH Manager

by bvisible

ssh_key_manage

Manage SSH host key fingerprints in known_hosts. Verify, list, check, accept, or remove keys for a specified server.

Instructions

Manages SSH host key fingerprints in your local known_hosts file for the named server. The action parameter selects: verify, check, and list are read-only comparisons or listings; accept adds or updates the host key in known_hosts; remove deletes it. accept and remove mutate local state and are blocked on servers configured as readonly. server is required for every action except list. autoAccept defaults to false and should be used with caution.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
actionYesAction to perform
serverNoServer name (required for most actions)
autoAcceptNoAutomatically accept new keys (use with caution)

Schema Changelog

Changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. Changed1 schema field changedv3.8.5
    • removedInput schema / additionalProperties
      Removed value: -false
  2. Addedv1.0.0

TDQS

A4.6/5.0
Behavior5/5

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

With no annotations provided, the description carries full responsibility for behavioral disclosure. It explicitly classifies verify/check/list as read-only, states that accept and remove mutate local state, and warns that autoAccept should be used with caution. It also tells the agent that mutation is blocked on readonly servers, which is essential safety context.

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 compact and front-loaded with the tool's purpose, then moves through action semantics and safety conditions. Every sentence contributes information, with no filler or repetition of schema trivia.

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 covers the main actions, mutation risks, readonly blocking, and parameter requirements. However, it does not clearly distinguish verify, check, and list from one another, which could lead an agent to choose the wrong read-only action. Since there is no output schema, some indication of return behavior would also have improved completeness.

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

Parameters5/5

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

Although schema coverage is 100%, the schema only says 'Action to perform' for action and 'use with caution' for autoAccept. The description adds real semantic value by grouping the enum values into read-only versus mutating operations, clarifying the conditional requirement for server, and giving the default and caution for autoAccept.

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 opens with a specific verb and resource: it manages SSH host key fingerprints in the local known_hosts file for a named server. It then enumerates concrete actions, making it easy to distinguish from sibling tools like ssh_execute or ssh_tunnel_create.

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

Usage Guidelines4/5

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

The description clearly explains what each action does and notes that server is required for every action except list. It also mentions that accept and remove are blocked on readonly servers, giving useful usage constraints, though it does not explicitly name alternative tools for comparison.

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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