Tool-Call Schema Validator & Fixer Prompt

The agent produced the tool call below. Validate it against the tool's schema.
If valid, say OK. If invalid, return:
1. The specific field that failed.
2. The constraint violated.
3. The corrected call (as a JSON object the agent can re-emit).
Do not guess values not derivable from the original call + schema.

Tool call:
{{call}}
Schema:
{{schema}}

Replace the {{fields}} with your own context and tighten the rules to match your domain.