Resolve a Norwegian organisasjonsnummer (9-digit org number) into a structured company profile sourced from Brønnøysund Enhetsregisteret (data.brreg.no). The response carries the company's display name, organisational form (e.g. AS = Aksjeselskap, ENK = Enkeltpersonforetak, ASA = Allmennaksjesels...
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AI agents call get_company_profile to retrieve information from Mcp without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though get_company_profile only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"get_company_profile": {}
}
}See the full Mcp policy for all 13 tools.
These attack patterns abuse exactly the kind of access get_company_profile gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Resolve a Norwegian organisasjonsnummer (9-digit org number) into a structured company profile sourced from Brønnøysund Enhetsregisteret (data.brreg.no). The response carries the company's display name, organisational form (e.g. AS = Aksjeselskap, ENK = Enkeltpersonforetak, ASA = Allmennaksjeselskap), Norwegian industry codes (NACE) with descriptions, the registered street address (forretningsadresse) and any separate business address (postadresse), the Enhetsregisteret registration date, the agent-facing status enum (active for operating entities, dissolved for entities that have been deleted, gone bankrupt, are under voluntary or forced liquidation), the dissolution date when known (slettedato), the MVA-registered flag (registrertIMvaregisteret), and a deduplicated list of role codes assigned to natural persons (DAGL, LEDE, MEDL, NESTL, INNH, etc.). Per Norwegian data minimisation rules (CLAUDE.md Rule 11), the response deliberately CARRIES role codes ONLY — never personal identifiers (fødselsdato, personnummer, home address, email, phone). The data is Tier 1 public infrastructure under NLOD (Norsk lisens for offentlige data); no delegation is required. Cache TTL is 24 hours (matches Brreg's daily publish cadence); if Brreg is unavailable, the response may serve a stale cached row up to 7 days old with metadata.stale=true and metadata.staleness_seconds populated. Required scope: read:brreg.. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for get_company_profile: 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 Mcp. Nothing to install.
get_company_profile 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 get_company_profile 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 get_company_profile. 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.
get_company_profile is provided by the MCP server (https://www.apier.no/api/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 13 Mcp tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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