ons.stats.population
Retrieve mid-year population estimates for the UK, England, Wales, or local authorities from the ONS. Annual estimates of usual resident population as at 30 June, by area, age group, and sex. Default returns total population for England and Wales (all ages, all sexes). Use geography parameter wit...
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What ons.stats.population does on Apibase
AI agents call ons.stats.population to retrieve information from Apibase 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 |
|---|---|---|---|
age | string | — | Age filter. Default "total" (all ages combined). Use a single year of age (e.g. "0", "25", "90") to get population for that age group only. |
sex | string | — | Sex breakdown. Default "all" (total population). Options: "male", "female". |
geography | string | — | ONS geography code for the area. Default "K04000001" (England and Wales). Other codes: "E92000001" (England), "W92000004" (Wales). Use the ONS geography portal |
Parameters from the server's own tool schema.
Why ons.stats.population is rated Low
Tool retrieves publicly available demographic statistics with no side effects or modification capabilities.
From the tool's definition Retrieve mid-year population estimates for the UK, England, Wales, or local authorities
Attacks that exploit this kind of access
The rule that runs ons.stats.population safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Apibase, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For ons.stats.population, this is the rule to start with:
ons.stats.population is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Apibase, apply this rule, and every ons.stats.population call is checked against it from then on.
Questions about ons.stats.population
Retrieve mid-year population estimates for the UK, England, Wales, or local authorities from the ONS. Annual estimates of usual resident population as at 30 June, by area, age group, and sex. Default returns total population for England and Wales (all ages, all sexes). Use geography parameter with ONS geography codes (K02000001=UK, K04000001=England & Wales, E92000001=England, W92000004=Wales) and age parameter for single-year-of-age breakdowns. Source: ONS mid-year population estimates, OGL v3.0. It is categorised as a Read tool in the Apibase MCP Server, which means it retrieves data without modifying state.
ons.stats.population accepts 3 parameters: age, sex, geography. The full parameter table on this page comes from the server's own tool schema.
Register the Apibase MCP server in PolicyLayer and add a rule for ons.stats.population: 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 Apibase. Nothing to install.
ons.stats.population 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 ons.stats.population 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 ons.stats.population. 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.
ons.stats.population is provided by the Apibase MCP server (apibase-mcp-client). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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