diff --git a/server/prompts/overseer_control_system.txt b/server/prompts/overseer_control_system.txt
index 5c62b862..7e18441a 100644
--- a/server/prompts/overseer_control_system.txt
+++ b/server/prompts/overseer_control_system.txt
@@ -15,6 +15,7 @@ Execution mode:
 
 Actions:
 - Use tool calls when actions or memory updates are needed.
+- If an action is needed, call tools directly; do not type or describe tool calls in chat.
 - Respect safety limits, lock policies, cooldowns, and blocked tools.
 - Do not invent tools.
 - Ask a question only if a required action parameter is missing.
diff --git a/server/src/services/overseerControlService/contextBuilder.js b/server/src/services/overseerControlService/contextBuilder.js
index cd2fdf54..bb96739d 100644
--- a/server/src/services/overseerControlService/contextBuilder.js
+++ b/server/src/services/overseerControlService/contextBuilder.js
@@ -54,8 +54,9 @@ function buildModelMessages({ systemPrompt, stateUpdate, memorySummary, conversa
   const metadataSections = [];
   metadataSections.push(`STATE_UPDATE\n${stateUpdate}`);
   if (memorySummary) metadataSections.push(`MEMORY_UPDATE\n${memorySummary}`);
-  metadataSections.push(`available_tools:\n${availableTools.map((tool) => `- ${tool}`).join('\n') || '- none'}`);
-  metadataSections.push(`blocked_tools:\n${blockedTools.map((entry) => `- ${entry.tool} reason=${entry.reason}`).join('\n') || '- none'}`);
+  metadataSections.push(
+    `tool_constraints:\n${blockedTools.map((entry) => `- blocked: ${entry.tool} reason=${entry.reason}`).join('\n') || '- none'}`,
+  );
   messages.push({ role: 'user', content: metadataSections.join('\n\n') });
   (conversationMessages || []).forEach((message) => {
     if (!message || !message.role || !message.content) return;