TokenLab MCP Server

Generate content (Gemini-compatible)

create_gemini_content

Generate content with Gemini models using a structured request schema. Provide model and conversation contents to obtain responses, supporting tools, safety settings, and generation configs.

Instructions

Generates content using the Gemini GenerateContent request shape. The model details must advertise Gemini requests and the model must be available. ProtoJSON lowerCamelCase and original proto snake_case field names are preserved. Unknown fields are accepted on a best-effort basis; model-specific support is not guaranteed. Authentication: Use ?key= query parameter, x-goog-api-key header, or Authorization: Bearer header.

Input Schema

TableJSON Schema

Name	Required	Description
`model`	Yes	Model name (e.g., gemini-2.5-pro)
`tools`	No	Gemini tools. Tool types and combinations are interpreted by the selected service.
`contents`	Yes	Conversation contents
`toolConfig`	No	Gemini tool configuration such as functionCallingConfig.
`tool_config`	No	Original proto field-name spelling of toolConfig.
`cachedContent`	No	Gemini cached content resource name for compatible models.
`cached_content`	No	Original proto field-name spelling of cachedContent.
`safetySettings`	No
`safety_settings`	No	Original proto field-name spelling of safetySettings.
`generationConfig`	No
`generation_config`	No	Original proto field-name spelling of generationConfig.
`systemInstruction`	No
`system_instruction`	No	Original proto field-name spelling of systemInstruction.
`X-TokenLab-Delivery-Policy`	No	Per-request Delivery policy. Overrides the API key and Workspace defaults. Auto tries TokenLab Veri…

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedv0.6.26Oct 3, 2026

changedInput schema / properties / generationConfig / properties / responseModalities / description

Previous value: -"Requested output modalities for compatible native Gemini routes."New value: +"Requested output modalities for supported Gemini models."

Changed1 schema field changedv0.6.24Oct 2, 2026

addedInput schema / properties / X-TokenLab-Delivery-Policy

Added value: +{
+  "description": "Per-request Delivery policy. Overrides the API key and Workspace defaults. Auto tries TokenLab Veri…",
+  "enum": [
+    "auto",
+    "verified",
+    "official"
+  ],
+  "type": "string"
+}

Changed58 schema fields changedv0.6.4Jul 25, 2026

removedInput schema / $schema

Removed value: -"http://json-schema.org/draft-07/schema#"

addedInput schema / properties / cached_content

Added value: +{
+  "description": "Original proto field-name spelling of cachedContent.",
+  "type": "string"
+}

removedInput schema / properties / contents / items / additionalProperties
```
Removed value: -{}
```

removedInput schema / properties / contents / items / properties / parts / items / anyOf

Removed value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "text": {
-        "type": "string"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "inlineData": {
-        "additionalProperties": {},
-        "properties": {
-          "data": {
-            "type": "string"
-          },
-          "mimeType": {
-            "type": "string"
-          }
-        },
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "inline_data": {
-        "additionalProperties": {},
-        "properties": {
-          "data": {
-            "type": "string"
-          },
-          "mime_type": {
-            "type": "string"
-          }
-        },
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "fileData": {
-        "additionalProperties": {},
-        "properties": {
-          "fileUri": {
-            "type": "string"
-          },
-          "mimeType": {
-            "type": "string"
-          }
-        },
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "file_data": {
-        "additionalProperties": {},
-        "properties": {
-          "file_uri": {
-            "type": "string"
-          },
-          "mime_type": {
-            "type": "string"
-          }
-        },
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "videoMetadata": {
-        "additionalProperties": {},
-        "properties": {},
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "video_metadata": {
-        "additionalProperties": {},
-        "properties": {},
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "thought": {
-        "type": "boolean"
-      },
-      "thoughtSignature": {
-        "type": "string"
-      },
-      "thought_signature": {
-        "type": "string"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "functionCall": {
-        "additionalProperties": {},
-        "properties": {},
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "functionResponse": {
-        "additionalProperties": {},
-        "properties": {},
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "executableCode": {
-        "additionalProperties": {},
-        "properties": {},
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "codeExecutionResult": {
-        "additionalProperties": {},
-        "properties": {},
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "function_call": {
-        "additionalProperties": {},
-        "properties": {},
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "function_response": {
-        "additionalProperties": {},
-        "properties": {},
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "executable_code": {
-        "additionalProperties": {},
-        "properties": {},
-        "type": "object"
-      }
-    },
-    "type": "object"
-  },
-  {
-    "additionalProperties": {},
-    "properties": {
-      "code_execution_result": {
-        "additionalProperties": {},
-        "properties": {},
-        "type": "object"
-      }
-    },
-    "type": "object"
-  }
-]

removedInput schema / properties / generationConfig / additionalProperties
```
Removed value: -{}
```

changedInput schema / properties / generationConfig / properties / candidateCount / description

Previous value: -"Number of response candidates for non-streaming generation. Streaming requests must omit this field or keep it at 1."New value: +"Requested number of response candidates. Support is determined by the selected service."

removedInput schema / properties / generationConfig / properties / candidateCount / maximum
```
Removed value: -9007199254740991
```
removedInput schema / properties / generationConfig / properties / maxOutputTokens / maximum
```
Removed value: -9007199254740991
```
changedInput schema / properties / generationConfig / properties / responseSchema / additionalProperties
```
Previous value: -{}New value: +true
```
removedInput schema / properties / generationConfig / properties / responseSchema / properties
```
Removed value: -{}
```
changedInput schema / properties / generationConfig / properties / thinkingConfig / additionalProperties
```
Previous value: -{}New value: +true
```
removedInput schema / properties / generationConfig / properties / thinkingConfig / properties / thinkingBudget / maximum
```
Removed value: -9007199254740991
```
removedInput schema / properties / generationConfig / properties / thinkingConfig / properties / thinkingBudget / minimum
```
Removed value: --9007199254740991
```
changedInput schema / properties / generationConfig / properties / thinking_config / additionalProperties
```
Previous value: -{}New value: +true
```
removedInput schema / properties / generationConfig / properties / thinking_config / properties / thinking_budget / maximum
```
Removed value: -9007199254740991
```
removedInput schema / properties / generationConfig / properties / thinking_config / properties / thinking_budget / minimum
```
Removed value: --9007199254740991
```
removedInput schema / properties / generationConfig / properties / topK / maximum
```
Removed value: -9007199254740991
```

addedInput schema / properties / generation_config

Added value: +{
+  "additionalProperties": true,
+  "description": "Original proto field-name spelling of generationConfig.",
+  "type": "object"
+}

removedInput schema / properties / safetySettings / items / additionalProperties
```
Removed value: -{}
```

addedInput schema / properties / safety_settings

Added value: +{
+  "description": "Original proto field-name spelling of safetySettings.",
+  "items": {
+    "additionalProperties": true,
+    "type": "object"
+  },
+  "type": "array"
+}

removedInput schema / properties / systemInstruction / additionalProperties
```
Removed value: -{}
```
removedInput schema / properties / systemInstruction / properties / parts / items / additionalProperties
```
Removed value: -{}
```
removedInput schema / properties / systemInstruction / properties / parts / items / properties
```
Removed value: -{
-  "text": {
-    "type": "string"
-  }
-}
```

addedInput schema / properties / system_instruction

Added value: +{
+  "additionalProperties": true,
+  "description": "Original proto field-name spelling of systemInstruction.",
+  "type": "object"
+}

changedInput schema / properties / toolConfig / additionalProperties
```
Previous value: -{}New value: +true
```
changedInput schema / properties / toolConfig / properties / functionCallingConfig / additionalProperties
```
Previous value: -{}New value: +true
```
removedInput schema / properties / toolConfig / properties / functionCallingConfig / properties / allowedFunctionNames / items / type
```
Removed value: -"string"
```
changedInput schema / properties / toolConfig / properties / function_calling_config / additionalProperties
```
Previous value: -{}New value: +true
```
removedInput schema / properties / toolConfig / properties / function_calling_config / properties / allowed_function_names / items / type
```
Removed value: -"string"
```

addedInput schema / properties / tool_config

Added value: +{
+  "additionalProperties": true,
+  "description": "Original proto field-name spelling of toolConfig.",
+  "type": "object"
+}

changedInput schema / properties / tools / description

Previous value: -"Gemini tools. Supported tool combinations depend on the selected model and route; unsupported native image-output tool combinations are rejected before upstream retries."New value: +"Gemini tools. Tool types and combinations are interpreted by the selected service."

changedInput schema / properties / tools / items / additionalProperties
```
Previous value: -{}New value: +true
```
removedInput schema / properties / tools / items / properties / codeExecution / additionalProperties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / codeExecution / properties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / code_execution / additionalProperties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / code_execution / properties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / computerUse / additionalProperties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / computerUse / properties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / computer_use / additionalProperties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / computer_use / properties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / functionDeclarations / items / additionalProperties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / functionDeclarations / items / properties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / functionDeclarations / items / type
```
Removed value: -"object"
```
removedInput schema / properties / tools / items / properties / function_declarations / items / additionalProperties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / function_declarations / items / properties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / function_declarations / items / type
```
Removed value: -"object"
```
removedInput schema / properties / tools / items / properties / googleSearch / additionalProperties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / googleSearch / properties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / googleSearchRetrieval / additionalProperties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / googleSearchRetrieval / properties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / google_search / additionalProperties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / google_search / properties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / google_search_retrieval / additionalProperties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / google_search_retrieval / properties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / urlContext / additionalProperties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / urlContext / properties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / url_context / additionalProperties
```
Removed value: -{}
```
removedInput schema / properties / tools / items / properties / url_context / properties
```
Removed value: -{}
```

Changed48 schema fields changedv0.3.1Jul 10, 2026

addedInput schema / additionalProperties
```
Added value: +false
```

changedInput schema / properties / cachedContent / description

Previous value: -"Optional cached content resource name."New value: +"Gemini cached content resource name for compatible models."

changedInput schema / properties / contents / description

Previous value: -"Native Gemini conversation contents."New value: +"Conversation contents"

removedInput schema / properties / contents / items / properties / parts / items / additionalProperties
```
Removed value: -{}
```

addedInput schema / properties / contents / items / properties / parts / items / anyOf

Added value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "text": {
+        "type": "string"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "inlineData": {
+        "additionalProperties": {},
+        "properties": {
+          "data": {
+            "type": "string"
+          },
+          "mimeType": {
+            "type": "string"
+          }
+        },
+        "type": "object"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "inline_data": {
+        "additionalProperties": {},
+        "properties": {
+          "data": {
+            "type": "string"
+          },
+          "mime_type": {
+            "type": "string"
+          }
+        },
+        "type": "object"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "fileData": {
+        "additionalProperties": {},
+        "properties": {
+          "fileUri": {
+            "type": "string"
+          },
+          "mimeType": {
+            "type": "string"
+          }
+        },
+        "type": "object"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "file_data": {
+        "additionalProperties": {},
+        "properties": {
+          "file_uri": {
+            "type": "string"
+          },
+          "mime_type": {
+            "type": "string"
+          }
+        },
+        "type": "object"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "videoMetadata": {
+        "additionalProperties": {},
+        "properties": {},
+        "type": "object"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "video_metadata": {
+        "additionalProperties": {},
+        "properties": {},
+        "type": "object"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "thought": {
+        "type": "boolean"
+      },
+      "thoughtSignature": {
+        "type": "string"
+      },
+      "thought_signature": {
+        "type": "string"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "functionCall": {
+        "additionalProperties": {},
+        "properties": {},
+        "type": "object"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "functionResponse": {
+        "additionalProperties": {},
+        "properties": {},
+        "type": "object"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "executableCode": {
+        "additionalProperties": {},
+        "properties": {},
+        "type": "object"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "codeExecutionResult": {
+        "additionalProperties": {},
+        "properties": {},
+        "type": "object"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "function_call": {
+        "additionalProperties": {},
+        "properties": {},
+        "type": "object"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "function_response": {
+        "additionalProperties": {},
+        "properties": {},
+        "type": "object"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "executable_code": {
+        "additionalProperties": {},
+        "properties": {},
+        "type": "object"
+      }
+    },
+    "type": "object"
+  },
+  {
+    "additionalProperties": {},
+    "properties": {
+      "code_execution_result": {
+        "additionalProperties": {},
+        "properties": {},
+        "type": "object"
+      }
+    },
+    "type": "object"
+  }
+]

removedInput schema / properties / contents / items / properties / parts / items / properties
```
Removed value: -{}
```
removedInput schema / properties / contents / items / properties / parts / items / type
```
Removed value: -"object"
```
removedInput schema / properties / contents / items / properties / parts / minItems
```
Removed value: -1
```
removedInput schema / properties / contents / items / required
```
Removed value: -[
-  "parts"
-]
```
removedInput schema / properties / contents / minItems
```
Removed value: -1
```
removedInput schema / properties / generationConfig / description
```
Removed value: -"Native Gemini generation configuration."
```

addedInput schema / properties / generationConfig / properties / candidateCount

Added value: +{
+  "description": "Number of response candidates for non-streaming generation. Streaming requests must omit this field or keep it at 1.",
+  "maximum": 9007199254740991,
+  "minimum": 1,
+  "type": "integer"
+}

addedInput schema / properties / generationConfig / properties / maxOutputTokens

Added value: +{
+  "maximum": 9007199254740991,
+  "minimum": 1,
+  "type": "integer"
+}

addedInput schema / properties / generationConfig / properties / responseMimeType

Added value: +{
+  "description": "Requested output MIME type, such as text/plain or application/json.",
+  "type": "string"
+}

addedInput schema / properties / generationConfig / properties / responseModalities

Added value: +{
+  "description": "Requested output modalities for compatible native Gemini routes.",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

addedInput schema / properties / generationConfig / properties / responseSchema

Added value: +{
+  "additionalProperties": {},
+  "description": "JSON schema for structured output when responseMimeType requests JSON.",
+  "properties": {},
+  "type": "object"
+}

addedInput schema / properties / generationConfig / properties / stopSequences

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

addedInput schema / properties / generationConfig / properties / temperature
```
Added value: +{
+  "minimum": 0,
+  "type": "number"
+}
```

addedInput schema / properties / generationConfig / properties / thinkingConfig

Added value: +{
+  "additionalProperties": {},
+  "description": "Thinking budget options for compatible Gemini models.",
+  "properties": {
+    "thinkingBudget": {
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    }
+  },
+  "type": "object"
+}

addedInput schema / properties / generationConfig / properties / thinking_config

Added value: +{
+  "additionalProperties": {},
+  "description": "Snake-case thinking budget options for compatible Gemini models.",
+  "properties": {
+    "thinking_budget": {
+      "maximum": 9007199254740991,
+      "minimum": -9007199254740991,
+      "type": "integer"
+    }
+  },
+  "type": "object"
+}

addedInput schema / properties / generationConfig / properties / topK

Added value: +{
+  "maximum": 9007199254740991,
+  "minimum": 1,
+  "type": "integer"
+}

addedInput schema / properties / generationConfig / properties / topP

Added value: +{
+  "maximum": 1,
+  "minimum": 0,
+  "type": "number"
+}

changedInput schema / properties / model / description

Previous value: -"Public TokenLab Gemini-compatible model ID."New value: +"Model name (e.g., gemini-2.5-pro)"

removedInput schema / properties / model / minLength
```
Removed value: -1
```

removedInput schema / properties / prompt

Removed value: -{
-  "description": "Convenience shortcut for one user text part; do not combine with contents.",
-  "minLength": 1,
-  "type": "string"
-}

removedInput schema / properties / safetySettings / description
```
Removed value: -"Native Gemini safety settings."
```
addedInput schema / properties / safetySettings / items / properties / category
```
Added value: +{
+  "type": "string"
+}
```
addedInput schema / properties / safetySettings / items / properties / threshold
```
Added value: +{
+  "type": "string"
+}
```
removedInput schema / properties / systemInstruction / description
```
Removed value: -"Native Gemini system instruction."
```

addedInput schema / properties / systemInstruction / properties / parts

Added value: +{
+  "items": {
+    "additionalProperties": {},
+    "properties": {
+      "text": {
+        "type": "string"
+      }
+    },
+    "type": "object"
+  },
+  "type": "array"
+}

removedInput schema / properties / temperature

Removed value: -{
-  "description": "Convenience temperature setting; do not combine with generationConfig.temperature.",
-  "minimum": 0,
-  "type": "number"
-}

changedInput schema / properties / toolConfig / description

Previous value: -"Native Gemini tool configuration."New value: +"Gemini tool configuration such as functionCallingConfig."

addedInput schema / properties / toolConfig / properties / functionCallingConfig

Added value: +{
+  "additionalProperties": {},
+  "properties": {
+    "allowedFunctionNames": {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "mode": {
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

addedInput schema / properties / toolConfig / properties / function_calling_config

Added value: +{
+  "additionalProperties": {},
+  "properties": {
+    "allowed_function_names": {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "mode": {
+      "type": "string"
+    }
+  },
+  "type": "object"
+}

changedInput schema / properties / tools / description

Previous value: -"Native Gemini tools."New value: +"Gemini tools. Supported tool combinations depend on the selected model and route; unsupported native image-output tool combinations are rejected before upstream retries."

addedInput schema / properties / tools / items / properties / codeExecution

Added value: +{
+  "additionalProperties": {},
+  "properties": {},
+  "type": "object"
+}

addedInput schema / properties / tools / items / properties / code_execution

Added value: +{
+  "additionalProperties": {},
+  "properties": {},
+  "type": "object"
+}

addedInput schema / properties / tools / items / properties / computerUse

Added value: +{
+  "additionalProperties": {},
+  "properties": {},
+  "type": "object"
+}

addedInput schema / properties / tools / items / properties / computer_use

Added value: +{
+  "additionalProperties": {},
+  "properties": {},
+  "type": "object"
+}

addedInput schema / properties / tools / items / properties / functionDeclarations

Added value: +{
+  "items": {
+    "additionalProperties": {},
+    "properties": {},
+    "type": "object"
+  },
+  "type": "array"
+}

addedInput schema / properties / tools / items / properties / function_declarations

Added value: +{
+  "items": {
+    "additionalProperties": {},
+    "properties": {},
+    "type": "object"
+  },
+  "type": "array"
+}

addedInput schema / properties / tools / items / properties / googleSearch

Added value: +{
+  "additionalProperties": {},
+  "properties": {},
+  "type": "object"
+}

addedInput schema / properties / tools / items / properties / googleSearchRetrieval

Added value: +{
+  "additionalProperties": {},
+  "properties": {},
+  "type": "object"
+}

addedInput schema / properties / tools / items / properties / google_search

Added value: +{
+  "additionalProperties": {},
+  "properties": {},
+  "type": "object"
+}

addedInput schema / properties / tools / items / properties / google_search_retrieval

Added value: +{
+  "additionalProperties": {},
+  "properties": {},
+  "type": "object"
+}

addedInput schema / properties / tools / items / properties / urlContext

Added value: +{
+  "additionalProperties": {},
+  "properties": {},
+  "type": "object"
+}

addedInput schema / properties / tools / items / properties / url_context

Added value: +{
+  "additionalProperties": {},
+  "properties": {},
+  "type": "object"
+}

changedInput schema / required

Previous value: -[
-  "model"
-]New value: +[
+  "model",
+  "contents"
+]

Changed11 schema fields changedv0.3.0Jul 10, 2026

addedInput schema / properties / cachedContent

Added value: +{
+  "description": "Optional cached content resource name.",
+  "type": "string"
+}

addedInput schema / properties / contents

Added value: +{
+  "description": "Native Gemini conversation contents.",
+  "items": {
+    "additionalProperties": {},
+    "properties": {
+      "parts": {
+        "items": {
+          "additionalProperties": {},
+          "properties": {},
+          "type": "object"
+        },
+        "minItems": 1,
+        "type": "array"
+      },
+      "role": {
+        "enum": [
+          "user",
+          "model"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "parts"
+    ],
+    "type": "object"
+  },
+  "minItems": 1,
+  "type": "array"
+}

addedInput schema / properties / generationConfig

Added value: +{
+  "additionalProperties": {},
+  "description": "Native Gemini generation configuration.",
+  "properties": {},
+  "type": "object"
+}

changedInput schema / properties / prompt / description

Previous value: -"User prompt text."New value: +"Convenience shortcut for one user text part; do not combine with contents."

addedInput schema / properties / safetySettings

Added value: +{
+  "description": "Native Gemini safety settings.",
+  "items": {
+    "additionalProperties": {},
+    "properties": {},
+    "type": "object"
+  },
+  "type": "array"
+}

addedInput schema / properties / systemInstruction

Added value: +{
+  "additionalProperties": {},
+  "description": "Native Gemini system instruction.",
+  "properties": {},
+  "type": "object"
+}

changedInput schema / properties / temperature / description

Previous value: -"Optional Gemini generation temperature."New value: +"Convenience temperature setting; do not combine with generationConfig.temperature."

removedInput schema / properties / temperature / maximum
```
Removed value: -2
```

addedInput schema / properties / toolConfig

Added value: +{
+  "additionalProperties": {},
+  "description": "Native Gemini tool configuration.",
+  "properties": {},
+  "type": "object"
+}

addedInput schema / properties / tools

Added value: +{
+  "description": "Native Gemini tools.",
+  "items": {
+    "additionalProperties": {},
+    "properties": {},
+    "type": "object"
+  },
+  "type": "array"
+}

changedInput schema / required

Previous value: -[
-  "model",
-  "prompt"
-]New value: +[
+  "model"
+]

First observedv0.2.0Jul 9, 2026

TDQS

A4.1/5.0

Behavior4/5

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

Annotations already declare non-readonly, open-world, non-idempotent behavior, and the description adds real value beyond that: the dual naming convention, best-effort handling of unknown fields, and three concrete authentication mechanisms. It does not mention rate limits, quotas, or error behavior, so it falls short of a 5.

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?

Four front-loaded sentences, each carrying distinct information (contract, availability precondition, naming/unknown-field behavior, auth). The bolded Authentication block is well-placed; no filler, though the proto-naming sentence could be tightened.

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 14-parameter, deeply nested tool with no output schema, the description covers the contract, prerequisites, naming duality, and auth. It omits what the response looks like and any token/candidate limits, but given the annotations and rich schema this is close to complete.

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 ~79% schema coverage the schema carries most of the load, but the description explains the otherwise-puzzling duplication of parameters by stating that both lowerCamelCase and proto snake_case field names are preserved, which directly disambiguates the paired fields. That is meaningful semantics beyond the schema.

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+resource ('Generates content') and pins the exact request contract ('Gemini GenerateContent request shape'), which cleanly separates it from the many sibling generators (create_anthropic_message, create_chat_completion, create_response). An agent can route to it without opening the schema.

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

Usage Guidelines3/5

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

It gives a prerequisite ('the model details must advertise Gemini requests and the model must be available') but never states when to pick this over create_chat_completion or create_anthropic_message. Usage is implied by the Gemini-specific framing rather than spelled out.

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

Generate content (Gemini-compatible)

Instructions

Input Schema

Schema Changelog

TDQS

Other Tools