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agent-sec

by ai.kernora
OverviewDiscussionsAdmin

check_action

Advisory check: given a described action or command the agent is about to take, return the baseline security factlets that plausibly apply, so the agent can self-correct. Advisory only — does NOT block. Real-time blocking is Kernora Agent Security's paid Integrity Plane.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "action": "<action>"
    },
    "name": "check_action"
  }
}

Input Schema

NameRequiredDescriptionDefault
actionYesthe action/command about to run

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

A4.3/5.0
Behavior4/5

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

With no annotations, the description carries full responsibility for behavioral disclosure. It honestly states that the tool is advisory-only and does NOT block, and that blocking is a paid feature. It also implies non-exhaustive matching with 'plausibly apply.' While it doesn't explicitly say it's read-only, the advisory nature strongly implies no 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.

Conciseness5/5

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

The description is two sentences, front-loaded with the primary purpose. Every clause earns its place: the behavior, the non-blocking caveat, and the paid alternative. There is no filler or redundancy.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple tool with one parameter and no output schema, the description fully captures what the agent needs to know: when to use it, what it does, and its limitations. The distinction from the paid blocking offering adds valuable context without requiring a full comparison to the sibling 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?

The schema has 100% coverage for the single 'action' parameter, with a clear description. The tool description adds only a slight rephrasing ('described action or command') and doesn't introduce new semantic details beyond what the schema already provides. Baseline 3 is appropriate when schema fully documents the parameter.

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 a specific verb ('check') and resource ('action/command'), and explains the outcome: return baseline security factlets for self-correction. It distinguishes itself from the sibling tool by emphasizing the advisory, non-blocking nature, which is likely the intended contrast with get_security_baseline.

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 provides clear usage context: use when the agent is about to take an action and wants advisory security feedback. It explicitly notes that it does NOT block, and mentions the paid Integrity Plane for real-time blocking, implying when the stronger alternative is needed. However, it does not explicitly compare with the sibling tool get_security_baseline or state exclusions.

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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