RepoBound provides 4 well-named, verb-led tools (status, index, search, pack) with clear descriptions (avg 95 chars). All tools have input schemas with type definitions and parameter descriptions. However, output schemas are not documented in the visible code, and parameter constraints lack specificity (e.g., 'limit' has no min/max bounds, 'controls' array has no item schema). Error handling is present but generic. Tool composition is sound, search and pack chain naturally. Naming follows verb_noun convention and disambiguates clearly.

• Document output schemas for all 4 tools. Specify: status returns {indexed: boolean, ...}; search returns {candidates: [{file, symbols, reasons}], total, ...}; pack returns {markdown, tokenEstimate, ...}. Include field types and whether results are paginated.
• Add explicit min/max bounds to 'limit' parameter: 'limit (1 to STRUCTURAL_V1.cli.maximumLimit, default 20)'. Prevents LLM from passing invalid values.
• Enumerate valid 'controls' directives in pack tool. Replace 'Optional context control directives (max 32 items)' with 'One or more of: exclude_tests, exclude_docs, prioritize_main, ...' or link to documentation.
• Enhance error messages with recovery guidance. E.g., 'Index not found. Call index() to build it first.' or 'Invalid task: must contain non-whitespace. Provide a coding task description (1-5000 chars).'
• Clarify task parameter format with an example: 'Natural-language coding task (e.g., "Add OAuth2 login to auth.ts"). Must be 1-MAXIMUM_TASK_BYTES UTF-8 bytes with non-whitespace content.'