This x64dbg MCP server provides 21 well-organized debugging tools with explicit schemas and descriptions. Tool naming follows verb_noun conventions consistently (debug_*, register_*, memory_*). However, several definition quality gaps prevent a higher score: (1) Many parameter descriptions lack specificity about format constraints, allowed ranges, or when to use each tool instead of similar ones. (2) No output schemas are documented, LLMs cannot predict what fields to expect from tool responses, blocking downstream tool chaining. (3) No error handling guidance is visible, tools lack recovery instructions if calls fail. (4) Tool descriptions are adequate (100-300 chars) but some lack 'when to use' context. (5) Parameter descriptions are present but often minimal (15-40 chars), missing format/range guidance. Example: 'register_get' returns a register value but the output structure is undocumented. The server demonstrates solid baseline quality with clear naming and present-but-sparse documentation, landing in the 'Fair' range (60-69) typical of community servers.

• Document output schemas for all tools. Example: register_get should return {name: string, value: string, size: integer}. memory_read should return {address: string, data: string, size: integer}. Use a schema section in the tool definition visible in code.
• Add format constraints to address/data parameters. Specify: 'Hex format: 0x-prefixed, 1 - 16 chars. Case-insensitive (0x401000 or 0x401000). Single address only; use memory_read for ranges.'
• Add recovery guidance to descriptions. Example: debug_attach_pid → 'If PID not found, use your OS process listing tool or try debug_init to launch a new session. If attach times out (>15000ms), increase timeout_ms or check if target is frozen.'
• Rename dot-notation tools: xref.get → xref_get, function.list → function_list, function.get → function_get. Improves command-line compatibility and tool router parsing.
• Expand parameter descriptions to 50 - 100 chars per param. Add 'when to use' and 'common values' hints. Example: size parameter → 'Bytes to read (1 - 65536; 256 is typical for small memory dumps, 4096 for large).'
• Document state prerequisites in tool descriptions. Example: debug_step_into → 'Requires debugger paused at a breakpoint. If already running, call debug_pause first.'
• Add upper bounds to batch operations. register_get_batch: 'Max 64 registers per call.' memory_read: 'Max 1MB per read (use pagination for larger regions).'
• Provide guidance on tool selection. Example: 'Use register_get for a single register, register_list for overview, register_get_batch for multiple named registers.' Place in function.list/function.get descriptions to distinguish them.

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry