improvement(mcp): restructure mcp tools caching/fetching info to improve UX (#2416)

* feat(mcp): improve cache practice

* restructure mcps fetching, caching, UX indicators

* fix schema

* styling improvements

* fix tooltips and render issue

* fix loading sequence + add redis

---------

Co-authored-by: waleed <walif6@gmail.com>

apps/sim/tools/index.ts

@@ -107,6 +107,7 @@ const MCP_SYSTEM_PARAMETERS = new Set([
   'workflowVariables',
   'blockData',
   'blockNameMapping',
+  '_toolSchema',
 ])
 
 /**
@@ -979,7 +980,10 @@ async function executeMcpTool(
       }
     }
 
-    const requestBody = {
+    // Get tool schema if provided (from agent block's cached schema)
+    const toolSchema = params._toolSchema
+
+    const requestBody: Record<string, any> = {
       serverId,
       toolName,
       arguments: toolArguments,
@@ -987,6 +991,11 @@ async function executeMcpTool(
       workspaceId, // Pass workspace context for scoping
     }
 
+    // Include schema to skip discovery on execution
+    if (toolSchema) {
+      requestBody.toolSchema = toolSchema
+    }
+
     const body = JSON.stringify(requestBody)
 
     // Check request body size before sending
@@ -995,6 +1004,7 @@ async function executeMcpTool(
     logger.info(`[${actualRequestId}] Making MCP tool request to ${toolName} on ${serverId}`, {
       hasWorkspaceId: !!workspaceId,
       hasWorkflowId: !!workflowId,
+      hasToolSchema: !!toolSchema,
     })
 
     const response = await fetch(`${baseUrl}/api/mcp/tools/execute`, {