nina_clear_guider_calibration

THE RISK

Critical Risk

Why nina_clear_guider_calibration needs a policy

Clearing calibration data is an irreversible action that destroys previously computed calibration information. The guider would need to be recalibrated before it can be used again, making this a destructive operation. Severity is medium as it doesn't affect physical hardware but does require time-consuming recalibration to restore functionality.

From the tool's definition Clear the guider's calibration data

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

POLICY

How to control nina_clear_guider_calibration

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

policy.json

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

nina_clear_guider_calibration 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 Nina Advanced API MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

Related tools and policies

More Nina Advanced API MCP tools

Execute nina_start_cooling nina_start_cooling Execute nina_start_flats nina_start_flats Execute nina_start_guiding Start guiding with optional calibration. Execute nina_start_warming nina_start_warming Execute nina_stop_cooling Stop the camera's cooling process in NINA astronomy software. Execute nina_stop_dome_movement Stop the dome's current movement in NINA astronomy software. Execute nina_stop_flats Stop the current flats capture in NINA astronomy software. Execute nina_stop_guiding Stop the current guiding operation.

All 103 Nina Advanced API MCP tools →

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Go deeper

Critical-risk tools in Nina Advanced API MCP → 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 nina_clear_guider_calibration

What does the nina_clear_guider_calibration tool do? +

Clear the guider's calibration data. It is categorised as a Destructive tool in the Nina Advanced API MCP 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 nina_clear_guider_calibration? +

Register the Nina Advanced API MCP server in PolicyLayer and add a rule for nina_clear_guider_calibration: 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 Nina Advanced API MCP. Nothing to install.

What risk level is nina_clear_guider_calibration? +

nina_clear_guider_calibration 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 nina_clear_guider_calibration? +

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

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

nina_clear_guider_calibration is provided by the Nina Advanced API MCP server (padev1/nina_advanced_api_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Nina Advanced API MCP tool call.

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

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