Medical Terminologies MCP

ICD-11 Entity Details

icd11_lookup

Read-onlyIdempotent

Retrieve full details for a single ICD-11 entity from its code or URI, including definition, coding notes, inclusions, exclusions, official title, and synonyms.

Instructions

Get detailed information about ONE ICD-11 entity you already have a code or URI for.

Use this tool to:

Get the full definition of a disease
Retrieve coding notes, inclusions and exclusions
Get the official title and index terms (synonyms)

Provide code (e.g., "BA00") or uri (any URI a previous answer returned) — at least one is required; calling with neither returns a validation error naming both. Set language for WHO's official translations (e.g. language: "pt" for official Portuguese).

Returns a single entity (no pagination). A code WHO does not know comes back as a "not found" error, never an empty record.

When NOT to use: to find a code from a disease name, use icd11_search first; to walk parents/children, use icd11_hierarchy; for an ICD-10 code (like "E11"), convert it with map_icd10_to_icd11 — ICD-10 codes are not ICD-11 codes.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`uri`	No	Full ICD-11 foundation URI
`code`	No	ICD-11 code (e.g., "BA00", "1A00")
`language`	No	Language code (default: en). Returns the source's OFFICIAL translation when it exists (e.g. 'pt' for official Portuguese); content is never machine-translated.	en

Output Schema

TableJSON Schema

Name	Required	Description
`uri`	Yes
`code`	Yes
`title`	Yes
`block_id`	Yes
`class_kind`	Yes
`code_range`	Yes
`definition`	Yes
`exclusions`	Yes
`inclusions`	Yes
`provenance`	Yes	Provenance block (contract v1.1): source, URL, data vintage, extraction instant, origin diagnostics, citation, license
`attribution`	Yes	Canonical source URLs of this response (attribution list)
`browser_url`	Yes
`coding_note`	Yes
`index_terms`	Yes
`long_definition`	Yes
`diagnostic_criteria`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedv1.15.0Sep 27, 2026

changedOutput schema / properties / provenance / description

Previous value: -"Provenance block (contract v1.0): source, URL, data vintage, extraction instant, citation, license"New value: +"Provenance block (contract v1.1): source, URL, data vintage, extraction instant, origin diagnostics, citation, license"

addedOutput schema / properties / provenance / properties / retrieval

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "anomalies": {
+          "description": "Anomalias superadas até o sucesso, somadas por classe, em ordem fixa; [] se nenhuma",
+          "items": {
+            "additionalProperties": false,
+            "properties": {
+              "count": {
+                "description": "Ocorrências desta classe na chamada",
+                "maximum": 9007199254740991,
+                "minimum": 1,
+                "type": "integer"
+              },
+              "kind": {
+                "description": "Classe da anomalia (vocabulário fechado do contrato)",
+                "enum": [
+                  "timeout",
+                  "network",
+                  "http_4xx",
+                  "http_5xx",
+                  "rate_limited",
+                  "malformed_body"
+                ],
+                "type": "string"
+              }
+            },
+            "required": [
+              "kind",
+              "count"
+            ],
+            "type": "object"
+          },
+          "type": "array"
+        },
+        "attempts": {
+          "description": "Tentativas somadas, incluindo as repetidas (>= requests)",
+          "maximum": 9007199254740991,
+          "minimum": 1,
+          "type": "integer"
+        },
+        "requests": {
+          "description": "Idas distintas à origem que compõem esta resposta (fatias, páginas)",
+          "maximum": 9007199254740991,
+          "minimum": 1,
+          "type": "integer"
+        },
+        "unstable": {
+          "description": "true se houve repetição (attempts > requests) ou alguma anomalia",
+          "type": "boolean"
+        }
+      },
+      "required": [
+        "requests",
+        "attempts",
+        "anomalies",
+        "unstable"
+      ],
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "description": "Origin diagnostics of THIS source in this call (contract v1.1): requests made to the upstream, attempts summed across retries, anomalies worked around (kind + count); unstable=true when any anomaly happened. null when nothing was measured (bundled dataset, or response served entirely from cache)"
+}

changedOutput schema / properties / provenance / required

Previous value: -[
-  "source",
-  "source_url",
-  "data_vintage",
-  "retrieved_at",
-  "citation",
-  "license"
-]New value: +[
+  "source",
+  "source_url",
+  "data_vintage",
+  "retrieved_at",
+  "retrieval",
+  "citation",
+  "license"
+]

Changed1 schema field changedv1.11.0Sep 15, 2026
- addedInput schema / additionalProperties
```
Added value: +false
```

Changed22 schema fields changedv1.9.1Sep 1, 2026

removedOutput schema / properties / block_id / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / block_id / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / browser_url / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / browser_url / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / class_kind / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / class_kind / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / code / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / code / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / code_range / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / code_range / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / coding_note / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / coding_note / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / definition / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / definition / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / diagnostic_criteria / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / diagnostic_criteria / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / long_definition / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / long_definition / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / provenance / properties / data_vintage / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / provenance / properties / data_vintage / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / provenance / properties / license / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / provenance / properties / license / type
```
Added value: +[
+  "string",
+  "null"
+]
```

Changed4 schema fields changedv1.8.0Aug 10, 2026

changedInput schema / properties / language / description

Previous value: -"Language code (default: en)"New value: +"Language code (default: en). Returns the source's OFFICIAL translation when it exists (e.g. 'pt' for official Portuguese); content is never machine-translated."

addedOutput schema / properties / attribution

Added value: +{
+  "description": "Canonical source URLs of this response (attribution list)",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

addedOutput schema / properties / provenance

Added value: +{
+  "additionalProperties": false,
+  "description": "Provenance block (contract v1.0): source, URL, data vintage, extraction instant, citation, license",
+  "properties": {
+    "citation": {
+      "description": "Ready-to-use citation/attribution string",
+      "type": "string"
+    },
+    "data_vintage": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "Version/release of the data as exposed by the source; null when not exposed"
+    },
+    "license": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "License / legal regime of the data"
+    },
+    "retrieved_at": {
+      "description": "Real instant of the upstream extraction (ISO-8601, UTC). Responses served from cache keep the ORIGINAL fetch instant.",
+      "type": "string"
+    },
+    "source": {
+      "description": "Official upstream source of this data",
+      "type": "string"
+    },
+    "source_url": {
+      "description": "Canonical URL of the source (API base or dataset release)",
+      "type": "string"
+    }
+  },
+  "required": [
+    "source",
+    "source_url",
+    "data_vintage",
+    "retrieved_at",
+    "citation",
+    "license"
+  ],
+  "type": "object"
+}

changedOutput schema / required

Previous value: -[
-  "code",
-  "code_range",
-  "uri",
-  "title",
-  "class_kind",
-  "block_id",
-  "definition",
-  "long_definition",
-  "diagnostic_criteria",
-  "coding_note",
-  "exclusions",
-  "inclusions",
-  "index_terms",
-  "browser_url"
-]New value: +[
+  "code",
+  "code_range",
+  "uri",
+  "title",
+  "class_kind",
+  "block_id",
+  "definition",
+  "long_definition",
+  "diagnostic_criteria",
+  "coding_note",
+  "exclusions",
+  "inclusions",
+  "index_terms",
+  "browser_url",
+  "provenance",
+  "attribution"
+]

Changed19 schema fields changedv1.5.7Jun 21, 2026

removedInput schema / additionalProperties
```
Removed value: -false
```

addedOutput schema / properties / block_id / anyOf

Added value: +[
+  {
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / block_id / type
```
Removed value: -[
-  "string",
-  "null"
-]
```

addedOutput schema / properties / browser_url / anyOf

Added value: +[
+  {
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / browser_url / type
```
Removed value: -[
-  "string",
-  "null"
-]
```

addedOutput schema / properties / class_kind / anyOf

Added value: +[
+  {
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / class_kind / type
```
Removed value: -[
-  "string",
-  "null"
-]
```

addedOutput schema / properties / code / anyOf

Added value: +[
+  {
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / code / type
```
Removed value: -[
-  "string",
-  "null"
-]
```

addedOutput schema / properties / code_range / anyOf

Added value: +[
+  {
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / code_range / type
```
Removed value: -[
-  "string",
-  "null"
-]
```

addedOutput schema / properties / coding_note / anyOf

Added value: +[
+  {
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / coding_note / type
```
Removed value: -[
-  "string",
-  "null"
-]
```

addedOutput schema / properties / definition / anyOf

Added value: +[
+  {
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / definition / type
```
Removed value: -[
-  "string",
-  "null"
-]
```

addedOutput schema / properties / diagnostic_criteria / anyOf

Added value: +[
+  {
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / diagnostic_criteria / type
```
Removed value: -[
-  "string",
-  "null"
-]
```

addedOutput schema / properties / long_definition / anyOf

Added value: +[
+  {
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedOutput schema / properties / long_definition / type
```
Removed value: -[
-  "string",
-  "null"
-]
```

First observedv1.2.1May 11, 2026

TDQS

A4.9/5.0

Behavior5/5

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

Annotations already declare readOnly/idempotent/openWorld/non-destructive, so the description rightly spends its words elsewhere: it discloses that the result is a single entity with no pagination, that an unknown code returns a 'not found' error rather than an empty record, that omitting both code and uri yields a validation error naming both, and that translations are WHO-official and never machine-translated. These are real behavioral facts an agent cannot get from the structured fields.

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 single-sentence purpose, then bulleted capabilities, then parameter rules, then exclusions. Every sentence carries distinct information; there is no filler or repetition of the annotations.

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, so return-value structure need not be described, yet the description still supplies the cardinality ('single entity, no pagination') and the error contract. Combined with full parameter coverage and the sibling routing, an agent has everything needed to call this correctly on the first attempt.

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?

Schema coverage is 100%, so the baseline is 3, but the description adds a genuine cross-parameter constraint the schema does not express (required is 0): 'at least one is required; calling with neither returns a validation error naming both.' It also clarifies that `uri` may be 'any URI a previous answer returned.' The code example and the official-translation wording largely restate the schema descriptions, so it stops short of a 5.

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?

The description opens with a specific verb+resource+cardinality: 'Get detailed information about ONE ICD-11 entity you already have a code or URI for.' That last clause alone distinguishes it from icd11_search and icd11_hierarchy, which the description then names explicitly.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Provides an explicit 'Use this tool to' list (definitions, coding notes, inclusions/exclusions, titles/synonyms) and a dedicated 'When NOT to use' section that routes three distinct cases to icd11_search, icd11_hierarchy, and map_icd10_to_icd11 with the reason why. Nothing is left to inference.

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