crossref-get-journal

Fetch the full Crossref metadata record for a single journal by ISSN.

SERVERMeta Data Mcp SOURCEpypi:meta-data-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-derekslinz-meta-data-mcp/crossref-get-journal.md

WHAT IT DOES

What crossref-get-journal does on Meta Data Mcp

AI agents call crossref-get-journal to retrieve information from Meta Data Mcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why crossref-get-journal is rated Low

This tool retrieves published, publicly-available journal metadata by standard identifier (ISSN). It performs a read-only query against an open data API with no side effects, data modification, code execution, or financial impact. The blast radius of misuse is minimal—at worst, an agent could retrieve excessive metadata, but cannot corrupt, delete, or modify any data.

From the tool's definition Tool description states 'Fetch the full Crossref metadata record for a single journal by ISSN.' The verb 'Fetch' indicates retrieval without modification. Crossref is a public metadata registry for scholarly publications.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs crossref-get-journal safely

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

crossref-get-journal Allowed

crossref-get-journal 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": {
    "crossref-get-journal": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Meta Data Mcp, apply this rule, and every crossref-get-journal call is checked against it from then on.

FAQ

Questions about crossref-get-journal

What does the crossref-get-journal tool do? +

Fetch the full Crossref metadata record for a single journal by ISSN. It is categorised as a Read tool in the Meta Data Mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on crossref-get-journal? +

Register the Meta Data MCP server in PolicyLayer and add a rule for crossref-get-journal: 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 Meta Data Mcp. Nothing to install.

What risk level is crossref-get-journal? +

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

Can I rate-limit crossref-get-journal? +

Yes. Add a rate_limit block to the crossref-get-journal 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 crossref-get-journal completely? +

Set action: deny in the PolicyLayer policy for crossref-get-journal. 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 crossref-get-journal? +

crossref-get-journal is provided by the Meta Data MCP server (pypi:meta-data-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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