The Cure Protocol

get_lineage

Read-only

Read how one finding stands to the others: what it was built on and what has been built on it. Call this before you rely on a result, because a finding three links downstream of a contradicted one inherits the problem. NEXT: link_findings to declare your own relation.

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": {
      "id": "<id>"
    },
    "name": "get_lineage"
  }
}

Input Schema

Name	Required	Description	Default
`id`	Yes	Finding id.

Output Schema

Name	Required	Description	Default
`data`	No	The answer. Shape depends on the tool; describe_tool documents it.
`_meta`	No	source, generatedAt, sources (per-source lastSyncedAt and ageHours), rateLimit, disclaimer.

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 28, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": {},
+  "properties": {
+    "_meta": {
+      "additionalProperties": {},
+      "description": "source, generatedAt, sources (per-source lastSyncedAt and ageHours), rateLimit, disclaimer.",
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "data": {
+      "description": "The answer. Shape depends on the tool; describe_tool documents it."
+    }
+  },
+  "type": "object"
+}

Changed1 schema field changedOct 24, 2026
- addedInput schema / properties / id / maxLength
```
Added value: +20000
```
First observedOct 18, 2026

TDQS

A4.2/5.0

Behavior4/5

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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds genuinely new behavioral context: lineage is directional (ancestors vs. descendants) and appears transitive across multiple links ('three links downstream'), which tells the agent output can span more than one hop. It does not discuss depth limits or cost on deep graphs, but the output schema covers return shape.

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?

Three short sentences, zero filler: purpose, then justification for calling it, then the next step. The motivating rationale is placed after the purpose so the core verb front-loads the text.

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 an output schema and read-only annotations, the description supplies purpose, urgency rationale, and the follow-up tool — close to complete. What's missing is only minor: whether the traversal is transitive by default or depth-bounded, which matters given the 'three links downstream' framing.

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% with a single required 'id' documented as 'Finding id.', so the schema carries the parameter burden. The description adds only that the id designates 'one finding' — no format, prefix, or lookup guidance. Baseline 3 is appropriate here.

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?

States a specific verb and resource ('Read how one finding stands to the others') and immediately defines the two directions of the relation: what it was built on and what has been built on it. That disambiguates it from siblings like get_finding (fetch a finding) and get_abstraction_graph, and the 'NEXT: link_findings' pointer names the write counterpart.

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?

Gives an explicit when-to-use rule with a rationale: 'Call this before you rely on a result' because a downstream finding inherits an upstream contradiction. It also routes the agent to link_findings for the inverse (write) operation. It stops short of naming a when-not condition or the alternative read tools (e.g., find_evidence_contradictions) an agent might confuse it with.

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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