Skip to main content
Glama
grahammccain

Chart Library

cohort_analyze

Read-onlyIdempotent

Analyze historical cohort performance of stocks by symbol and date. Compare forward returns, risk profiles, and regime stratifications across similar chart patterns.

Instructions

[DEPRECATED in v5 — use cohort(depth="full", ...)]

Layer 3 cohort intelligence. Forwarded to cohort(depth="full").

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
symbolYes
dateYes
timeframeNo1h
cohort_sizeNo
filtersNo
horizonsNo
include_feature_importanceNo
include_regime_stratificationNo
include_risk_profileNo
exclude_same_symbol_daysNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior3/5

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

Annotations (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) already convey safety and idempotency. The description adds deprecation status and forwarding behavior, which is useful but does not elaborate on other behavioral traits.

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 extremely concise (two sentences), front-loaded with the critical deprecation warning, and contains no unnecessary words.

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

Completeness1/5

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

Despite having an output schema and many parameters, the description fails to explain input/output semantics or internal behavior. It is wholly incomplete for an agent to use this tool effectively.

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

Parameters1/5

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

With 0% schema description coverage and 10 parameters, the description provides no information about what each parameter does or how they affect the tool's behavior. This is a significant gap.

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?

The description clearly states the tool is deprecated and forwards to cohort(depth='full', ...), and mentions it provides 'Layer 3 cohort intelligence'. This gives a clear purpose, though it lacks detailed specification of what 'cohort intelligence' entails.

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

Usage Guidelines5/5

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

Explicitly tells the agent to use cohort(depth='full', ...) instead, providing a direct alternative and clear when-not-to-use guidance. This is excellent for deprecation.

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/grahammccain/chart-library-mcp'

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