claude-agent-sdk-tool-integration

Tool permissions control which tools an agent can access using allowedTools and disallowedTools configurations, plus a permissionMode setting. Define allowed tools explicitly, validate inputs against schemas, and apply least-privilege principles to restrict agent actions to only necessary operations like file I/O or data retrieval.

Yes, MCP server integration connects Claude agents to external resources and services. Configure sandboxed MCP servers in your Agent SDK setup to enable safe access to tools and data, then wire them into your agent's tool chain for automated execution.

Define custom tools with input schemas specifying parameters and constraints, then register them in the agent configuration. The Agent SDK validates inputs against your schemas and handles tool execution, streaming responses, and error states automatically.

The Agent SDK provides streaming tool response handling and robust error handling built-in. Responses flow back to the agent for decision-making; errors are caught and can trigger retry logic or fallback actions, ensuring reliable automated workflows.

Input validation is built into tool integration via schemas defined in the Agent SDK. Each custom tool specifies required fields and types; the SDK validates inputs before execution, catching mismatches early and preventing invalid commands from reaching your systems.

allowedTools is a whitelist—only listed tools are available to the agent. disallowedTools is a blacklist—all tools except listed ones are available. Use allowedTools for strictest control in sensitive workflows; use disallowedTools to exclude only specific risky operations while keeping others open.