Inspects a NetCDF file and returns a summary of its contents (dimensions, variables, coordinates).
AI agents call inspect_netcdf to retrieve information from Era5 without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries metadata from an existing NetCDF file without modifying, executing, or deleting anything. It is a read-only inspection operation with minimal risk. Even if misused, it can only expose data structure information, not cause side effects or data loss.
From the tool's definition Tool description states it 'Inspects a NetCDF file and returns a summary of its contents (dimensions, variables, coordinates)' — purely informational retrieval with no modification, deletion, or execution capability.
Documented attack patterns abuse exactly the kind of access inspect_netcdf gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Era5, and nothing reaches the server without passing your rules. This is the rule we recommend for inspect_netcdf:
{
"version": "1",
"default": "deny",
"tools": {
"inspect_netcdf": {}
}
}inspect_netcdf is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Inspects a NetCDF file and returns a summary of its contents (dimensions, variables, coordinates). It is categorised as a Read tool in the Era5 MCP Server, which means it retrieves data without modifying state.
Register the Era5 MCP server in PolicyLayer and add a rule for inspect_netcdf: 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 Era5. Nothing to install.
inspect_netcdf is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the inspect_netcdf 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.
Set action: deny in the PolicyLayer policy for inspect_netcdf. 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.
inspect_netcdf is provided by the Era5 MCP server (swnesbitt/era5-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Era5, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
3 Era5 tools catalogued and risk-classified — across an index of 43,000+ MCP servers.