Three tools with clear names and basic descriptions. All have input schemas with type definitions. However, parameter descriptions are sparse or missing (counter's 'action' enum lacks description; amount description is minimal). Output schemas are not documented. Error handling is present but minimal, read_file returns isError flags but lacks recovery guidance. No tool annotations (readOnlyHint/destructiveHint). Naming follows verb_noun convention (echo, read_file, counter) but descriptions are brief (avg ~100 chars, below the 194-char baseline for A+ tools). Schemas are present but incomplete, no documented return types or field descriptions.

• Add description to counter's 'action' parameter: 'One of: increment (add amount to counter), reset (set to 0), get (return current value).'
• Document return schemas for all tools. E.g., echo returns {type: 'text', text: string}; counter returns {type: 'text', text: string (numeric value)}.
• Add tool annotations: mark read_file with readOnlyHint=true; mark counter with destructiveHint=true (for reset action).
• Enhance error messages with recovery hints. E.g., 'Refused: path outside allowlist. Allowed roots: [list]. Try a path under one of these roots.'
• Clarify counter description: 'Modifies a persistent counter for the server lifetime. increment adds amount, reset clears to 0, get returns current value. State persists across calls.'