set_instance_instructions

Replace a subscribed instance

SERVERProAgentStore SOURCEhttps://mcp.proagentstore.online/mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/io-github-proagentstore-platform/set-instance-instructions.md

WHAT IT DOES

What set_instance_instructions does on ProAgentStore

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

RISK

Why set_instance_instructions is rated Medium

Alters instance instructions; affects agent behavior and operations but is reversible.

From the tool's definition Replace a subscribed instance; modifies agent configuration.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_instance_instructions safely

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

set_instance_instructions Rate-limited

set_instance_instructions 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": {
    "set_instance_instructions": {
      "limits": [
        {
          "counter": "set_instance_instructions_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 ProAgentStore, apply this rule, and every set_instance_instructions call is checked against it from then on.

FAQ

Questions about set_instance_instructions

What does the set_instance_instructions tool do? +

Replace a subscribed instance. It is categorised as a Write tool in the ProAgentStore MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_instance_instructions? +

Register the ProAgentStore MCP server in PolicyLayer and add a rule for set_instance_instructions: 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 ProAgentStore. Nothing to install.

What risk level is set_instance_instructions? +

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

Can I rate-limit set_instance_instructions? +

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

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

set_instance_instructions is provided by the ProAgentStore MCP server (https://mcp.proagentstore.online/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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