This server has a single tool 'add' with critical definition gaps. The tool is registered with a Zod schema (a: z.number(), b: z.number()) but has no description at all, and the parameters lack descriptions. The naming is generic and non-idiomatic (should be verb_noun style like 'add_numbers' or 'compute_sum'). No output schema is documented. This is a minimal proof-of-concept implementation that does not meet production quality baselines.

• Add a tool description: 'Add two numbers together and return the sum. Returns the numeric result as a text string.' (50-100 chars, explains WHAT, WHEN, WHAT it returns)
• Add parameter descriptions: a: 'First number to add (any real number)', b: 'Second number to add (any real number)'
• Rename tool from 'add' to 'add_numbers' to follow verb_noun convention and improve discoverability
• Document output schema: {type: 'object', properties: {result: {type: 'number', description: 'Sum of a and b'}}, required: ['result']}
• If applicable, add range constraints to parameters: a/b: {type: 'number', minimum: -1e10, maximum: 1e10} to prevent absurd input
• Add error handling: catch non-numeric inputs and return 'Invalid input: both a and b must be numbers' instead of letting exceptions propagate