Constant GREP_TOOL_SCHEMA 

pub const GREP_TOOL_SCHEMA: &str = r#"{
    "type": "object",
    "properties": {
        "pattern": {
            "type": "string",
            "description": "The regular expression pattern to search for"
        },
        "path": {
            "type": "string",
            "description": "File or directory to search in. Defaults to current directory."
        },
        "glob": {
            "type": "string",
            "description": "Glob pattern to filter files (e.g., '*.js', '*.{ts,tsx}')"
        },
        "type": {
            "type": "string",
            "description": "File type to search (e.g., 'js', 'py', 'rust', 'go'). More efficient than glob for standard types."
        },
        "output_mode": {
            "type": "string",
            "enum": ["files_with_matches", "content", "count"],
            "description": "Output mode. Defaults to 'files_with_matches'."
        },
        "-i": {
            "type": "boolean",
            "description": "Case insensitive search. Defaults to false."
        },
        "-n": {
            "type": "boolean",
            "description": "Show line numbers (content mode only). Defaults to true."
        },
        "-A": {
            "type": "integer",
            "description": "Lines to show after each match (content mode only)."
        },
        "-B": {
            "type": "integer",
            "description": "Lines to show before each match (content mode only)."
        },
        "-C": {
            "type": "integer",
            "description": "Lines to show before and after each match (content mode only)."
        },
        "multiline": {
            "type": "boolean",
            "description": "Enable multiline mode where . matches newlines. Defaults to false."
        },
        "limit": {
            "type": "integer",
            "description": "Maximum number of results to return. Defaults to 1000."
        }
    },
    "required": ["pattern"]
}"#;

Grep tool JSON schema constant.