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Kranz MCP

Kranz MCP

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ports

Inspect declared and detected service listeners; filter by runtime, service, or tag without changing owners.

Instructions

Inspect declared and detected service ports without changing their owners.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "ports"
  }
}

Input Schema

NameRequiredDescriptionDefault
runtimeNoProject runtime to address, by name or id from runtimes. Omit to use the project this MCP server was started in.
selectorsNoExact service names or case-insensitive tags.

Output Schema

NameRequiredDescriptionDefault
dataNoTool-specific payload; absent on failure.
errorNoCausal failure, absent on success.
sessionNoThe runtime that served this call; absent for global tools and for failures that resolved no runtime.
generationNoConfiguration generation the answer was read at; absent when no runtime served the call.
schema_versionYesEnvelope contract version.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.17.0

TDQS

B3.3/5.0
Behavior3/5

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

With no annotations provided, the description carries the full behavioral burden. It discloses that the tool does not change port owners, which implies a non-mutating operation, but it omits other operational traits such as required permissions or side effects. This is minimally adequate but leaves clear gaps.

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 a single, front-loaded sentence with no wasted words. It immediately states the action, object, and a key constraint.

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 tool is low-complexity with a fully documented schema and an output schema, so return values need not be explained. The description covers non-mutation but lacks routing guidance among siblings like 'port_inspect', and with no annotations, more operational detail would be expected.

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%, so both parameters are fully documented in the input schema. The description adds no additional parameter semantics beyond what the schema already provides, making the baseline score of 3 appropriate.

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 uses a specific verb ('Inspect') and resource ('declared and detected service ports'), making the tool's purpose clear. However, it does not differentiate itself from the sibling tool 'port_inspect', leaving ambiguity about which port-inspection tool to choose.

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?

The description provides no explicit guidance on when to use this tool versus alternatives such as 'port_inspect' or 'runtimes'. It only implies a read-oriented usage through 'without changing their owners', but gives no context or 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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