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Anthropic Administrator connects to a Nagent workspace with an API key. Once it is connected, agents can call 3 Anthropic Administrator actions: "Create Message", "Get Model" and "List models". Nothing is enabled on connect: each action is allowed one at a time, and an action with side effects runs or waits for a person according to the agent's level.
Every operation an agent can call against Anthropic Administrator, with input parameters and output schema.
ANTHROPIC_ADMINISTRATOR_CREATE_MESSAGECreate a message completion from Claude. Send a conversation history with user/assistant messages and receive Claude's response. Useful for: chatbots, Q&A systems, text generation, conversational AI, and any task requiring natural language understanding or generation.
Input parameters
Model identifier to use for generating the response. Examples: 'claude-sonnet-4-5-20250929', 'claude-opus-4-5-20251101', 'claude-3-haiku-20240307' Invalid or outdated identifiers trigger a not_found_error; use LIST_MODELS to retrieve current valid identifiers.
Sample from the top K tokens during generation
Nucleus sampling cutoff probability
System prompt to provide context and instructions to the model
List of messages forming the conversation. Must alternate between 'user' and 'assistant' roles, starting with 'user'. Each message must be an object with both 'role' ('user' or 'assistant') and 'content' (string) fields; missing either field causes validation errors.
Object with a user_id key for tracking and abuse detection
Maximum number of tokens to generate before stopping. Required parameter.
Sampling temperature between 0 (deterministic) and 1 (most random)
Custom text sequences that will cause the model to stop generating
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
ANTHROPIC_ADMINISTRATOR_GET_MODELTool to retrieve details of a specific model by its ID. Use after confirming the model ID is valid.
Input parameters
ID of the model to retrieve.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
ANTHROPIC_ADMINISTRATOR_LIST_MODELSTool to list available models. Use when you need to see which models are available before selection. Always source model IDs from this tool rather than hard-coding them; stale or outdated model IDs passed to CREATE_MESSAGE will cause a not_found_error.
Input parameters
Number of items per page. Default: 20, range: 1-1000.
Cursor ID to fetch results after this object.
Cursor ID to fetch results before this object.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
Agents can call 3 Anthropic Administrator actions on Nagent: "Create Message", "Get Model" and "List models". Create Message: Create a message completion from Claude. Each action is listed on this page with its input parameters and its output.
Anthropic Administrator connects with an API key, under your workspace's own connection. Nothing is enabled on connect: each action is allowed one at a time and can be scoped to the agents that need it.
Create Message takes 3 required inputs: model, messages and max_tokens. It also takes 6 optional inputs: top_k, top_p, system, metadata, temperature and stop_sequences. It returns data, error and successful.