`fss_policy_kg_check_currency` – 1 MCP server offers this tool

What it usually takes

No server marks it as only reading: treat it as able to change data.

From each publisher's own tool list. We never call a tool.

Server	Inputs	Read-only?
fss-policy-kg `co.huggingface.brockwebb/fss-policy-kg` Is a document still in force? Staleness flags plus supersession / revocation links. Returns: A JSON object with doc_id, source_url (the canonical link to the full source document —, cite it so a reader can open the original), is_stale, current_version_status, supersedes,, revoked_by, superseded_by, and basis_changed (present only when a statute this guidance, IMPLEMENTS has moved — a review trigger). An unknown id returns a structured error with, nearest-match suggestions.	`doc_id`	Not stated