Set Your Handle

MCP contract for set_handle.

MCP name: set_handle

Tool contract

{
  "annotations": {
    "destructiveHint": false,
    "openWorldHint": true,
    "readOnlyHint": false,
    "title": "Set Your Handle"
  },
  "description": "Change the signed-in user's handle (their username) — the first segment of their friendly app URLs (`https://charm.ing/<handle>/<app-name>`), so changing it changes the prefix of every app URL they share. Use this to give the current user a different handle. The old handle keeps working by redirecting to the new one, so links already shared stay valid. Acts on the current signed-in user only and takes no user id. Handle rules: lowercase letters, digits, and hyphens; 3-32 chars; must start with a letter; no leading, trailing, or consecutive hyphens; some words are reserved. Rate-limited to 3 changes per rolling 30 days.",
  "execution": {
    "taskSupport": "forbidden"
  },
  "inputSchema": {
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "properties": {
      "handle": {
        "description": "The desired new handle. Lowercase letters, digits, and hyphens; 3-32 chars; must start with a letter; no leading/trailing or consecutive hyphens. Input is lowercased and trimmed.",
        "type": "string"
      }
    },
    "required": [
      "handle"
    ],
    "type": "object"
  },
  "name": "set_handle",
  "outputSchema": {
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "additionalProperties": false,
    "properties": {
      "advisories": {
        "description": "Structured non-fatal advisories, including authoring issues and unread staff feedback responses. Each advisory.summary is also appended to the text content for the LLM path.",
        "items": {
          "additionalProperties": false,
          "properties": {
            "data": {
              "additionalProperties": {},
              "description": "Kind-specific structured payload. Shape varies per advisory kind.",
              "propertyNames": {
                "type": "string"
              },
              "type": "object"
            },
            "doc_url": {
              "description": "Optional docs pointer for this advisory kind.",
              "type": "string"
            },
            "kind": {
              "description": "Stable advisory identifier (e.g. \"legacy-bridge\").",
              "type": "string"
            },
            "severity": {
              "description": "Severity; omitted advisories are treated as 'info'.",
              "enum": [
                "info",
                "warn"
              ],
              "type": "string"
            },
            "summary": {
              "description": "Agent-facing summary. Self-sufficient; no extra context required.",
              "type": "string"
            },
            "userSummary": {
              "description": "End-user-facing summary. Set when the advisory should render in-app.",
              "type": "string"
            }
          },
          "required": [
            "kind",
            "summary"
          ],
          "type": "object"
        },
        "type": "array"
      },
      "handle": {
        "description": "The new live handle for the signed-in user.",
        "type": "string"
      },
      "ok": {
        "const": true,
        "description": "Indicates success. Errors arrive as content with isError:true.",
        "type": "boolean"
      },
      "previousHandle": {
        "description": "The handle the user had before this change. Retained as an alias so old friendly URLs (`/<previousHandle>/<app>`) keep resolving (a redirect to the new handle). Empty string when the user had no prior handle.",
        "type": "string"
      }
    },
    "required": [
      "ok",
      "handle",
      "previousHandle"
    ],
    "type": "object"
  }
}