memory_delete_observations

THE RISK

Critical Risk

Why memory_delete_observations needs a policy

This tool irreversibly deletes user data (observations/details from entities), which is the defining characteristic of the Destructive category. While scoped to the user's own entity data rather than system-wide, the permanent nature of deletion and inability to recover justifies 'high' severity.

From the tool's definition Tool performs 'Delete and forget specific observations, details, or information from entities' - irreversibly removes data with no undo mechanism. The word 'delete' combined with 'forget' indicates permanent erasure.

Documented attack patterns abuse exactly the kind of access memory_delete_observations gives an agent:

POLICY

How to control memory_delete_observations

PolicyLayer is an MCP gateway — it sits between your AI agents and VaultAssist, and nothing reaches the server without passing your rules. This is the rule we recommend for memory_delete_observations:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "memory_delete_observations"
  ]
}

memory_delete_observations disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register VaultAssist — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More VaultAssist tools

Destructive batch_delete_gmail_emails Delete multiple emails at once Destructive clear_completed_tasks Clear all completed tasks from a task list. The tasks will be marked as hidden Destructive delete_event Delete an event from a Google Calendar Destructive delete_gmail_email Delete an email by its message ID Destructive delete_gmail_label Delete a Gmail label Destructive delete_task Delete a task from a task list Destructive delete_task_list Delete a task list. Note: This will also delete all tasks in the list Destructive memory_delete_entities Delete and forget multiple entities and their associated relationships from the user

All 79 VaultAssist tools →

Destructive tools on other servers

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Go deeper

Critical-risk tools in VaultAssist → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about memory_delete_observations

What does the memory_delete_observations tool do? +

Delete and forget specific observations, details, or information from entities in the user. It is categorised as a Destructive tool in the VaultAssist MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on memory_delete_observations? +

Register the VaultAssist MCP server in PolicyLayer and add a rule for memory_delete_observations: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches VaultAssist. Nothing to install.

What risk level is memory_delete_observations? +

memory_delete_observations is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit memory_delete_observations? +

Yes. Add a rate_limit block to the memory_delete_observations rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block memory_delete_observations completely? +

Set action: deny in the PolicyLayer policy for memory_delete_observations. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides memory_delete_observations? +

memory_delete_observations is provided by the VaultAssist MCP server (3xcaffeine/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every VaultAssist tool call.

Start from VaultAssist, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →