Three tools with basic schemas and descriptions, but significant gaps in parameter documentation and output schema clarity. Tool names follow verb_noun convention (create_session, get_session, simulate_session), which is good. However, descriptions are minimal (10-50 chars), parameter descriptions lack detail on constraints and formats, and output schemas are not documented. No error handling guidance visible. The simulate_session tool accepts a free-form 'action' string instead of an enum, inviting invalid values. Parameters lack type constraints (e.g., session_id could be any string). No evidence of idempotency markers or recovery guidance.

• Convert 'action' parameter in simulate_session to an enum: {type: 'string', enum: ['approve', 'decline', 'require-review', 'expire'], description: 'The outcome to simulate. approve: pass verification; decline: fail verification; require-review: escalate to human review; expire: session times out.'}
• Expand tool descriptions to 100-200 chars. Example for create_session: 'Create a new identity verification session. Returns a session_id and status. Use this to initiate a KYC flow; then call get_session to poll for completion or generate_link to send to the user.'
• Document output schemas for each tool. Example: create_session returns {session_id: string, status: string, created_at: string, external_ref?: string}. This enables LLMs to chain calls correctly.
• Add parameter descriptions with format/constraint hints. Example: session_id: 'The unique session identifier (UUID format, returned by create_session)'. metadata: 'Optional JSON object with custom key-value pairs for tracking (max 1KB).'
• Add error handling guidance. Example: 'If session_id is invalid, returns 404 with message "Session not found". Try create_session to start a new flow. If action is invalid, returns 400 with allowed values.'