use async_trait::async_trait;

#[derive(Debug, Clone)]
pub struct ToolResult {
    pub success: bool,
    pub output: String,
    pub error: Option<String>,
}

#[async_trait]
pub trait Tool: Send + Sync + 'static {
    fn name(&self) -> &str;
    fn description(&self) -> &str;
    fn parameters_schema(&self) -> serde_json::Value;
    async fn execute(&self, args: serde_json::Value) -> anyhow::Result<ToolResult>;

    /// Whether this tool is side-effect free and safe to parallelize.
    fn read_only(&self) -> bool {
        false
    }

    /// Whether this tool can run alongside other concurrency-safe tools.
    fn concurrency_safe(&self) -> bool {
        self.read_only() && !self.exclusive()
    }

    /// Whether this tool should run alone even if concurrency is enabled.
    fn exclusive(&self) -> bool {
        false
    }
}