Three tools with basic schemas and minimal descriptions. Tool naming is acceptable (verb-noun pattern), but descriptions are extremely brief (10-34 chars, well below the 194-char baseline). Parameter descriptions are entirely absent, the schema shows field names and types but no explanatory text for what each parameter controls. The search_with_criteria tool has a complex nested object schema that is visible and properly typed, but lacks any guidance on how to construct the request or what the returned fields should contain. No error handling guidance, no output schema documentation, and no indication of what fields are returned or how to chain results to other tools.

• Add 50 - 150 character descriptions to each tool explaining WHAT it does, WHEN to use it, and WHAT it returns. Example: 'add: Performs arithmetic addition on two integers. Use when the user asks for a sum. Returns the integer result.' 'search_with_criteria: Searches documents by multiple field criteria (e.g., field:value, field>value). Returns matching documents with specified fields. Call get_list_criteria first to see available field names.'
• Document every parameter with a description explaining its purpose, valid values, and format. Example for search_with_criteria: 'criteria: Array of search conditions. Each criterion requires field (string, e.g. "author"), value (string, e.g. "Smith"), and operator (one of ":" for equals, ">" for greater-than, "<" for less-than). returned_fields: Array of field names to include in results (e.g. ["title", "date", "author"]). Call get_list_criteria to see available fields.'
• Document output schemas. Example: 'add returns: integer (the sum). get_list_criteria returns: list of objects, each with {field: string, type: string, description: string}. search_with_criteria returns: object with {total: integer, results: array of objects with requested fields}.'
• Replace silent error handling (return None) with actionable error messages. Example: 'If API request fails, return {"error": "Failed to reach search service. Retry in 30 seconds or contact support."}' Include the invalid value and constraint in validation errors.
• Add dependency hints in descriptions. Example: 'search_with_criteria: Call get_list_criteria first to discover available field names and operators. Passing an invalid field name will return zero results.'