VeriSwarm MCP exposes 5 approval-management tools with clear verb-noun naming (create_approval, list_approvals, get_approval, approve_approval, reject_approval). All tools have descriptions (avg 95 chars) and input schemas with typed parameters. However, schemas lack output documentation, no response structure is visible in the source. Parameter descriptions are present but minimal (avg 45 chars); several lack actionable constraints (e.g., 'ttl_seconds' states range but not units or rationale). Error handling is implicit (401 for unauthorized) but not documented in tool descriptions. No tool annotations (readOnlyHint, destructiveHint) despite clear read/write semantics. Composition is sound, tools chain naturally (list → get → approve/reject). Security is well-designed (API key injection, role-based access), but not surfaced in tool metadata.

• Document output schemas for all 5 tools. Specify fields returned (e.g., approval_id, state, created_at, agent_id, requested_action_json, ttl_seconds, reason). Include which fields are safe to chain into downstream tools.
• Add tool annotations: mark approve_approval and reject_approval with destructiveHint=true; mark list_approvals and get_approval with readOnlyHint=true. This enables agents to reason about safety and idempotency.
• Enhance parameter descriptions with formal constraints. For 'ttl_seconds', add: 'Time-to-live in seconds (60 - 2592000, i.e., 1 minute to 30 days). Requests expire automatically after this duration.' For 'requested_action_json', provide a minimal example structure or link to schema documentation.
• Restructure error handling. Instead of embedding '401 for api-key-only callers' in the description, document error responses explicitly: 'Returns 401 Unauthorized if caller lacks operator role. Use account-session token instead of API key.'
• Add min/max constraints to schema for 'limit' parameter in list_approvals: {"type": "integer", "minimum": 1, "maximum": 500}. This prevents invalid input and makes constraints machine-parseable.