get_chain_of_title
Traces who has owned a trademark over time: the ownership stages the USPTO recorded, from the original applicant or registrant through each later owner, plus any recorded assignment documents GleanMark holds. Answers questions such as who owns a mark now versus who filed it, whether it was sold, ...
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What get_chain_of_title does on GleanMark Trademark Search
AI agents call get_chain_of_title to retrieve information from GleanMark Trademark Search 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 |
|---|---|---|---|
serial_number | string | Yes | USPTO serial number of the mark, e.g. "98725143". Registration numbers are not accepted — resolve to a serial first with lookup_trademark or search_trademarks. |
Parameters from the server's own tool schema.
Why get_chain_of_title is rated Low
Even though get_chain_of_title only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs get_chain_of_title safely
PolicyLayer is an MCP gateway: it sits between your AI agents and GleanMark Trademark Search, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_chain_of_title, this is the rule to start with:
get_chain_of_title 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 GleanMark Trademark Search, apply this rule, and every get_chain_of_title call is checked against it from then on.
Questions about get_chain_of_title
Traces who has owned a trademark over time: the ownership stages the USPTO recorded, from the original applicant or registrant through each later owner, plus any recorded assignment documents GleanMark holds. Answers questions such as who owns a mark now versus who filed it, whether it was sold, transferred or assigned, and how it reached its current owner, including chain-of-title and due-diligence questions. lookup_trademark shows only the current owner. Owners listed within one stage are joint owners, not successive ones. Not a title opinion. It is categorised as a Read tool in the GleanMark Trademark Search MCP Server, which means it retrieves data without modifying state.
get_chain_of_title accepts 1 parameter: serial_number. Required: serial_number. The full parameter table on this page comes from the server's own tool schema.
Register the GleanMark Trademark Search MCP server in PolicyLayer and add a rule for get_chain_of_title: 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 GleanMark Trademark Search. Nothing to install.
get_chain_of_title 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_chain_of_title 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_chain_of_title. 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_chain_of_title is provided by the GleanMark Trademark Search MCP server (https://gleanmark.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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