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Get HTTP latency

render_get_http_latency
Read-onlyIdempotent

Retrieve HTTP latency metrics for specified services, hosts, or paths within a time range, with configurable quantile and resolution.

Instructions

Get HTTP latency. Get HTTP latency metrics for one or more resources. Calls GET /metrics/http-latency on the Render Public API.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
hostNoThe hosts of HTTP requests to filter to. When multiple host query params are provided, they are ORed together
pathNoThe paths of HTTP requests to filter to. When multiple path query params are provided, they are ORed together
endTimeNoEpoch/Unix timestamp of end of time range to return. Defaults to `now()`.
serviceNoThis parameter is deprecated. Please use `resource` instead (deprecated)
quantileNoThe quantile of latencies to fetch. When multiple quantile query params are provided, they are ORed together
resourceNoService ID to query. When multiple service ids are provided, they are ORed together
startTimeNoEpoch/Unix timestamp of start of time range to return. Defaults to `now() - 1 hour`.
resolutionSecondsNoThe resolution of the returned data
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint, covering safety. The description adds the API call path, which provides useful context. No additional behavioral quirks are disclosed, but the annotations suffice.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is exceptionally concise with two sentences. The first sentence states the purpose directly, and the second adds the API endpoint. No unnecessary words or repetition.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given 8 parameters and no output schema, the description is somewhat incomplete. It does not describe the structure or format of the returned latency data, leaving the agent to infer from the parameter names. The annotations cover safety, but the description could be more thorough.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

All 8 parameters are fully described in the schema (100% coverage). The description mentions 'one or more resources' which adds minimal context about the resource parameter, but does not provide significant additional meaning beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool retrieves HTTP latency metrics for resources, and explicitly mentions the API endpoint. It distinguishes itself from sibling tools like render_get_http_requests by focusing on latency rather than request counts.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description does not provide explicit guidance on when to use this tool versus alternatives. It only states its function without explaining when it is appropriate or when other metrics tools might be better.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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