The Plane MCP server demonstrates basic tool organization with consistent naming patterns (verb_noun convention across all 21 tools) and structured parameter definitions using JSON Schema. However, it suffers from significant gaps in tool and parameter descriptions, lacks output schema documentation, and provides minimal error handling guidance. Parameter descriptions are present but often generic (e.g., 'Workspace slug', 'Project ID'). No tool descriptions exceed 200 characters, and many lack actionable context about when to use each tool or what happens on failure. The server registers tools with FastMCP using a modular registration pattern, which is sound architecturally, but the quality of individual tool definitions is mediocre. Most tools accept only positional identifiers (workspace_slug, project_id) without accepting human-friendly names, forcing agents into discovery detours.

• Add descriptive text (50 - 200 chars per pattern baseline) to every tool explaining WHAT it does, WHEN to call it instead of similar tools, and WHAT changes it makes. Example: 'get_project' → 'Retrieve a project by workspace slug and project ID. Returns project metadata (name, key, description). Use this to verify project exists before creating issues.'
• Document output schemas for all tools. Specify field names, types, and descriptions. Example: list_projects returns [{id: string, name: string, key: string, workspace_slug: string, ...}]. Include any pagination metadata (total_count, next_cursor).
• Enrich parameter descriptions with format constraints and actionable context. Example: 'workspace_slug' → 'Workspace slug: lowercase alphanumeric identifier from your Plane workspace URL (e.g., my-workspace from my-workspace.plane.so). Call list_workspaces() first if unsure.'
• Add natural identifier fallback. Modify tools to accept project_name in addition to project_id; resolve names to IDs inside the tool. This matches the chat data model (users say 'my project', not 'proj-123') and reduces discovery detours.
• Add pagination parameters (limit, offset) to all list_* tools. Document max results per call (e.g., max 50 items) and whether a total_count or next_cursor is returned. Prevent context window exhaustion from large result sets.
• Add error handling guidance. When a tool can fail (e.g., workspace not found, permission denied), describe the error and recovery step in the tool description. Example: 'If workspace_slug is invalid, call list_workspaces() to find the correct slug.'