Resources, Resource Templates, Prompts, and Completions

Resources

Resources are application-controlled, readable context. A URI identifies a resource, for example, docs://architecture/overview. Clients can list and read resources; templates expose parameterized URI patterns.

Prompts

Prompts are user-controlled, reusable message templates. For example, a “Review this incident” prompt can accept a required incident ID and a review style as arguments.

Choosing the capability

Pagination, subscriptions, and changes

• Return large lists in cursor-based pages.
• Use resource update subscriptions when both sides support the capability.
• When tool, resource, or prompt catalogs change, negotiated list-changed notifications can be used.
• Completion suggestions for prompt and resource arguments can improve the client user experience.

Security note

Access to a resource URI also requires an authorization check. A guessable URI does not grant permission to access the resource.