Get a value by key within a transaction
AI agents call tx_get to retrieve information from KevoDB MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves data from the database within a transactional context but performs no modifications, deletions, or external operations. It is a standard read operation with minimal blast radius—misuse cannot corrupt, delete, or modify data.
From the tool's definition Tool name 'tx_get' and description 'Get a value by key within a transaction' indicate a retrieval operation. The verb 'Get' and context of querying a key-value database confirm read-only semantics.
Attacks that exploit this kind of access
Get a value by key within a transaction. It is categorised as a Read tool in the KevoDB MCP Server MCP Server, which means it retrieves data without modifying state.
Register the KevoDB MCP Server MCP server in PolicyLayer and add a rule for tx_get: 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 KevoDB MCP Server. Nothing to install.
tx_get 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 tx_get 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 tx_get. 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.
tx_get is provided by the KevoDB MCP Server MCP server (kevodb/kevo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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