The Cure Protocol

find_trial_registrations

Read-only

USE WHEN you hold ONE registry identifier (from a paper, a news story, another database) and need to know whether it is the same real-world study as another identifier, or where else it is registered. Give any known id — NCT, ISRCTN, EUCT or EudraCT — and get back the canonical trial, every registry that holds it, the exact identifier evidence linking those registrations, and which registries it is absent from. Absence means absent from OUR index of that registry, not proof it was never registered there. NEXT: get_world_trial with the returned canonicalId for the full record.

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": "find_trial_registrations"
  }
}

Input Schema

Name	Required	Description	Default
`id`	Yes	Any known trial identifier, e.g. NCT07093359, ISRCTN13533177, 2023-505575-69-01.

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

A4.7/5.0

Behavior5/5

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

Goes well beyond the readOnly/openWorld annotations by disclosing the exact response contents (canonical trial, every holding registry, identifier-level linking evidence, and absence list) and, critically, warning that absence means absent from their index rather than proof of non-registration — a non-obvious interpretive caveat an agent could easily get wrong.

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?

Front-loaded with the triggering condition, then the input contract, then the return shape, then the caveat, then the next step. Every sentence carries distinct information — no restatement of the name or title.

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?

An output schema exists and annotations cover the safety profile, so the description doesn't need to re-document return values; what it does add — the absence-semantics caveat and the follow-up routing — is exactly the residual information an agent needs to use the result correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

With one parameter at 100% schema coverage the baseline is 3, but the description adds real value: the input must be a single identifier ('ONE registry identifier') and the accepted identifier families are enumerated (NCT, ISRCTN, EUCT, EudraCT), clarifying what counts as valid input beyond the schema's bare example.

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 precise verb and resource — take one registry identifier and resolve it to the canonical trial and all registries holding it — and explicitly contrasts that with the adjacent tasks (identity matching vs. where-else-registered). The 'NEXT: get_world_trial' pointer separates it from the full-record tool, so an agent can pick correctly without opening either schema.

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?

'USE WHEN you hold ONE registry identifier (from a paper, a news story, another database)' gives a concrete trigger condition, and the NEXT line routes follow-up to get_world_trial. It stops short of naming the alternative for the case the user has a title/keyword instead of an id (likely search_world_trials), so no explicit exclusion is stated.

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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