Three arithmetic tools with basic but incomplete definitions. All tools have names starting with action verbs (add, multiply, divide), which is correct. Tool descriptions are present but minimal (10-20 chars), falling below the 34-char minimum observed in production (p10 baseline). Parameter descriptions vary: 'add' has good descriptions ('First number to add', 'Second number to add'), but 'multiply' and 'divide' have vague/single-word descriptions ('number', 'amount to multiply by'). All three tools have proper input schemas with type definitions and min/max constraints (-1000 to 1000), which is a strength. However, output schemas are not documented, the code returns plain text in a content array, but there is no formal schema declaration visible to LLMs. Error handling is absent: the 'divide' tool does not check for division by zero, and no error recovery guidance is provided. Security is basic but acceptable for read-only arithmetic operations (all marked READ_ONLY). No pagination, batching, or composition considerations apply to these trivial tools, but the pattern shows no awareness of the broader tool-design rubric.

• Expand tool descriptions to 100 - 200 characters. Example: 'Add two numbers together. Accepts integers from -1000 to 1000. Returns the sum as a plain number. Use when combining numeric values, totals, or offsets.'
• Clarify parameter descriptions in 'multiply' and 'divide'. Change 'number' to 'The first operand (the number to multiply)' and 'amount to multiply by' to 'The second operand (the multiplier, range -1000 to 1000)'.
• Add input validation for 'divide'. Check if b === 0 and return a structured error: {error: 'Division by zero. Parameter b must not be 0.', retryable: false}. Update the tool description to note this constraint.
• Document the output schema in the tool definition. Add a field like 'returns: {type: 'object', properties: {content: {type: 'array', items: {type: 'object', properties: {type: {type: 'string'}, text: {type: 'string'}}}}}}' or equivalent schema annotation.
• Consider renaming tools to include context if this server will co-exist with non-arithmetic operations. E.g., 'arithmetic_add', 'arithmetic_multiply', 'arithmetic_divide' to avoid ambiguity in a larger tool ecosystem.