docs: Add Rustdoc comments for info and mcp modules and grep plugin

Co-authored-by: aider (openai/andrew/openrouter/sonoma-sky-alpha) <aider@aider.chat>

src/modes/server/mcp/server.rs

@@ -4,44 +4,61 @@ use serde_json::Value;
 use crate::modes::server::common::AppState;
 use super::tools::{KeepTools, ToolError};
 
-#[derive(Clone)]
 /// Server handler for MCP (Model Context Protocol) requests.
 ///
-/// Routes requests to appropriate tools and handles responses.
+/// Routes requests to appropriate tools and handles responses. Clones AppState for tool usage.
+///
+/// # Fields
+///
+/// * `state` - The shared application state (DB, config, etc.).
+#[derive(Clone)]
 pub struct KeepMcpServer {
     state: AppState,
 }
 
+/// Creates a new `KeepMcpServer` instance.
+///
+/// # Arguments
+///
+/// * `state` - The application state containing DB, config, and services.
+///
+/// # Returns
+///
+/// A new `KeepMcpServer` instance.
+///
+/// # Examples
+///
+/// ```
+/// let server = KeepMcpServer::new(app_state);
+/// ```
 impl KeepMcpServer {
-    /// Creates a new `KeepMcpServer` instance.
-    ///
-    /// # Arguments
-    ///
-    /// * `state` - The application state containing DB and config.
-    ///
-    /// # Returns
-    ///
-    /// A new `KeepMcpServer`.
     pub fn new(state: AppState) -> Self {
         Self { state }
     }
 
-    /// Handles an MCP request by routing to the appropriate tool.
-    ///
-    /// Supports methods like save_item, get_item, etc.
-    ///
-    /// # Arguments
-    ///
-    /// * `method` - The MCP method name.
-    /// * `params` - Optional JSON parameters.
-    ///
-    /// # Returns
-    ///
-    /// JSON string response on success, or ToolError.
-    ///
-    /// # Errors
-    ///
-    /// Returns ToolError::UnknownTool for unsupported methods.
+/// Handles an MCP request by routing to the appropriate tool.
+///
+/// Supports methods like "save_item", "get_item", "list_items". Logs the request and delegates to KeepTools.
+///
+/// # Arguments
+///
+/// * `method` - The MCP method name (string).
+/// * `params` - Optional JSON parameters as serde_json::Value.
+///
+/// # Returns
+///
+/// `Ok(String)` with JSON-serialized response on success, or `Err(ToolError)` on failure.
+///
+/// # Errors
+///
+/// * ToolError::UnknownTool if method unsupported.
+/// * Propagates tool-specific errors (e.g., invalid args, DB failures).
+///
+/// # Examples
+///
+/// ```
+/// let result = server.handle_request("save_item", Some(params)).await?;
+/// ```
     pub async fn handle_request(&self, method: &str, params: Option<Value>) -> Result<String, ToolError> {
         debug!("MCP: Handling request '{}' with params: {:?}", method, params);