Skip to main content
Glama

perf

Sample performance metrics and frame health for agent-device sessions to inspect app performance.

Instructions

Show session performance metrics and frame health.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sessionNoAgent-device session name.
platformNoPlatform selector used to resolve a device.
deviceTargetNoDevice target form. Maps to the CLI --target flag.
targetNoAlias for deviceTarget on commands without a UI target field. Interaction commands reserve target for the UI element.
deviceNoDevice name selector.
udidNoiOS device UDID selector.
serialNoAndroid serial selector.
iosSimulatorDeviceSetNoiOS simulator device-set path used for device resolution.
androidDeviceAllowlistNoAndroid serial allowlist used for device resolution.
daemonBaseUrlNoRemote daemon base URL.
daemonAuthTokenNoRemote daemon auth token.
tenantNoRemote tenant identifier.
runIdNoLease run identifier.
leaseIdNoExisting lease identifier.
cwdNoWorking directory for command execution.
debugNoEnable debug diagnostics.
areaNo
actionNo
stateDirNoAgent-device state directory.
Behavior2/5

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

No annotations provided, and description only states 'Show', implying read-only. Does not disclose side effects, error behavior, or resource consumption. Minimal behavioral insight.

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

Conciseness3/5

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

Single sentence with no wasted words, but lacks structure. Could be improved by front-loading key behavior and mentioning common parameter usage.

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

Completeness2/5

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

With 19 parameters and no output schema, description is too brief. Does not explain what metrics or frame health are returned, expected output format, or how to interpret results.

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?

Schema coverage is 89% (high), so baseline is 3. Description adds no additional meaning beyond parameter descriptions already in the schema.

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

Purpose4/5

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

Description uses specific verb 'Show' and resource 'session performance metrics and frame health', clearly indicating the tool's purpose. It distinguishes from sibling tools, which are primarily interaction or diagnostic tools, though no explicit differentiation.

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

Usage Guidelines2/5

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

No guidance on when to use this tool versus alternatives. The description does not mention prerequisites or contexts where this tool is appropriate.

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

Install Server

Other Tools

Latest Blog Posts

MCP directory API

We provide all the information about MCP servers via our MCP API.

curl -X GET 'https://glama.ai/api/mcp/v1/servers/callstack/agent-device'

If you have feedback or need assistance with the MCP directory API, please join our Discord server