gribstream_validate_request

SERVERGribStream MCP SOURCEhttps://gribstream.com/mcp

Low RISK CLASS

Category Read

Parameters 33 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/com-gribstream-mcp/gribstream-validate-request.md

WHAT IT DOES

What gribstream_validate_request does on GribStream MCP

AI agents call gribstream_validate_request to retrieve information from GribStream MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Parameter	Type	Required	Description
`dataset`	string	Yes	Dataset code, for example gfs, ifsoper, nbm, hrrr, or urma.
`request`	object	Yes	Request body to validate. Omit asOf unless the user explicitly asks for backtesting, time travel, what was known then, or a historical model-run cutoff for /tim
`endpoint`	string	Yes	Endpoint to validate.

Parameters from the server's own tool schema.

RISK

Why gribstream_validate_request is rated Low

Even though gribstream_validate_request only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Risk signalsAccepts freeform code/query input (request.expressions[].expression) · Accepts URL/endpoint input (endpoint) · High parameter count (37 properties)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs gribstream_validate_request safely

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

gribstream_validate_request Allowed

gribstream_validate_request is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "gribstream_validate_request": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about gribstream_validate_request

What does the gribstream_validate_request tool do? +

NO AUTH / PUBLIC / READ-ONLY. Validates the basic shape, exact selector tuples, and expression syntax of a proposed GribStream /timeseries or /runs request without sending it. This tool does not execute the request, query weather values, or return forecast data. Use this before returning any hand-edited curl or when changing a request from one dataset to another. It is categorised as a Read tool in the GribStream MCP MCP Server, which means it retrieves data without modifying state.

What parameters does gribstream_validate_request accept? +

gribstream_validate_request accepts 3 parameters: dataset, request, endpoint. Required: dataset, request, endpoint. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on gribstream_validate_request? +

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

What risk level is gribstream_validate_request? +

gribstream_validate_request is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit gribstream_validate_request? +

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

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

gribstream_validate_request is provided by the GribStream MCP server (https://gribstream.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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