kg_add_observation

Add a timestamped observation or fact to an entity. Observations are append-only notes that track changes, discoveries, or context over time.

SERVERCoWork OS SOURCECoWork-OS/CoWork-OS

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/cowork-os/kg-add-observation.md

WHAT IT DOES

What kg_add_observation does on CoWork OS

AI agents use kg_add_observation to create or update resources in CoWork OS, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your CoWork OS environment.

RISK

Why kg_add_observation is rated Medium

This tool creates and appends data to a knowledge graph or observation log in a reversible manner. It is a Write operation because it modifies state by adding information, but carries low severity since observations are append-only (no overwrites or deletions), limited to local personal knowledge management, and pose minimal risk if misused by an AI agent.

From the tool's definition The tool description states it will 'Add a timestamped observation or fact to an entity' and notes are 'append-only', indicating creation of new data records without destructive operations or external effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs kg_add_observation safely

PolicyLayer is an MCP gateway: it sits between your AI agents and CoWork OS, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For kg_add_observation, this is the rule to start with:

kg_add_observation Rate-limited

kg_add_observation stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "kg_add_observation": {
      "limits": [
        {
          "counter": "kg_add_observation_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect CoWork OS, apply this rule, and every kg_add_observation call is checked against it from then on.

FAQ

Questions about kg_add_observation

What does the kg_add_observation tool do? +

Add a timestamped observation or fact to an entity. Observations are append-only notes that track changes, discoveries, or context over time. It is categorised as a Write tool in the CoWork OS MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on kg_add_observation? +

Register the CoWork OS MCP server in PolicyLayer and add a rule for kg_add_observation: 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 CoWork OS. Nothing to install.

What risk level is kg_add_observation? +

kg_add_observation is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit kg_add_observation? +

Yes. Add a rate_limit block to the kg_add_observation 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 kg_add_observation completely? +

Set action: deny in the PolicyLayer policy for kg_add_observation. 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 kg_add_observation? +

kg_add_observation is provided by the CoWork OS MCP server (CoWork-OS/CoWork-OS). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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