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trace_dependency_path

Read-only

Find the shortest call path between two services and see live health at each hop to diagnose dependency failures during production incidents.

Instructions

Shortest call path between two services (algo.SPpaths), with live health per hop.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
to_serviceYes
from_serviceYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

B3.2/5.0
Behavior3/5

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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered. The description adds one genuinely useful behavioral trait beyond that — that results include live health per hop — but says nothing about failure modes (e.g. unreachable or non-existent services) or how the path is computed.

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 front-loaded sentence with no filler. The parenthetical 'algo.SPpaths' is internal jargon that adds little for an agent deciding whether to call the tool.

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?

With no output schema, the description must convey what comes back; 'live health per hop' is a start but leaves the response shape, path-finding semantics (hop count vs. latency), and error behavior unspecified.

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 0% for two required parameters, so the description carries the burden — yet it never explains from_service/to_service. The parameter names are largely self-explanatory, which keeps this at an adequate 3 rather than lower, but no added meaning is provided.

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?

States a specific verb+resource: computing the shortest call path between two named services, and adds the distinguishing detail that health is reported per hop. It does not explicitly contrast with siblings like get_blast_radius or query_graph, so it falls short of a 5.

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, no prerequisites, and no named alternative. The agent must infer that this is the tool for path tracing rather than graph querying or blast-radius analysis purely from the name.

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