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KoruShield

Koru Shield MCP Server

Official
by KoruShield

list_rules

List custom allow and deny rules for a DNS filtering profile. Provide profile_id to view all configured rules.

Instructions

List custom allow/deny rules for a profile.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
profile_idYesProfile ID (use list_profiles to discover IDs)

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?

No annotations are provided, so the description carries the full disclosure burden. 'List' implies a read-only operation, which is useful, but there is no mention of pagination, ordering, permissions, or how many rules might be returned. Adequate for a low-risk read, but thin.

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?

A single efficient sentence with the resource front-loaded and zero filler. It is well-formed, though terse enough that it borders on under-specification rather than true conciseness.

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?

For a one-parameter read tool with a fully documented schema, the definition covers what the tool returns at a high level ('allow/deny rules'). With no output schema, more detail on the return shape would help, but the gap is minor.

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 100% and the single profile_id parameter already documents itself and points to list_profiles for discovery. The description adds no parameter detail beyond the schema, so the baseline of 3 applies.

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?

The description states a specific verb (List) and resource (custom allow/deny rules) scoped to a profile, which clearly separates it from create_rule and delete_rule. It does not explicitly name siblings, but the purpose is unambiguous.

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?

There is no when-to-use guidance and no alternatives named; the only hint of usage is 'for a profile', which the required profile_id parameter already enforces. An agent gets no exclusions or routing cues.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.