Search property parcels by street address and get assessed value, land use, and most recent sale for each match. Coverage: Maryland statewide (all 24 jurisdictions, includes sale prices) and Harris County, TX / Houston (appraised value only, no sale prices since Texas is a non-disclosure state). ...
Risk signalsAccepts freeform code/query input (query)
Part of the Livedatalink server.
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AI agents call parcel_search to retrieve information from Livedatalink 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 parcel_search 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": {
"parcel_search": {}
}
}See the full Livedatalink policy for all 177 tools.
These attack patterns abuse exactly the kind of access parcel_search 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.
Search property parcels by street address and get assessed value, land use, and most recent sale for each match. Coverage: Maryland statewide (all 24 jurisdictions, includes sale prices) and Harris County, TX / Houston (appraised value only, no sale prices since Texas is a non-disclosure state). Returns valuation and characteristics only, not owner names. Use parcel_details for the full record.. It is categorised as a Read tool in the Livedatalink MCP Server, which means it retrieves data without modifying state.
Register the Livedatalink MCP server in PolicyLayer and add a rule for parcel_search: 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 Livedatalink. Nothing to install.
parcel_search 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 parcel_search 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 parcel_search. 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.
parcel_search is provided by the Livedatalink MCP server (https://livedatalink.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 177 Livedatalink tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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