List all spans (execution traces) for a specific experiment.
AI agents call list_experiment_spans to retrieve information from Respan 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 and queries execution trace data for monitoring purposes without creating, modifying, deleting, or executing any operations. It is a straightforward read operation that aligns with the 'Read' category for data retrieval with no side effects. Confidence is high because the description is clear and unambiguous.
From the tool's definition Tool name is 'list_experiment_spans' and description states 'List all spans (execution traces) for a specific experiment.' The verb 'list' and action 'retrieve spans' indicate data retrieval with no modification or deletion.
Attacks that exploit this kind of access
List all spans (execution traces) for a specific experiment. It is categorised as a Read tool in the Respan MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Respan MCP Server MCP server in PolicyLayer and add a rule for list_experiment_spans: 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 Respan MCP Server. Nothing to install.
list_experiment_spans 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 list_experiment_spans 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 list_experiment_spans. 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.
list_experiment_spans is provided by the Respan MCP Server MCP server (respanai/respan-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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