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

No annotations are provided, so the description carries the full behavioral burden, but it does not say whether this is a read-only operation, whether it has rate limits or auth requirements, or how errors are surfaced. It mentions 'time series' but gives no return-shape or pagination context.

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

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

A single front-loaded sentence with no wasted words. It is efficient, though its brevity leaves important usage and behavioral context unaddressed.

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

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

The description adequately names the resource and implies a time-series return, and the schema fully documents parameters. However, for an eight-parameter tool with no annotations or output schema, it omits interval choices, series-type implications, and datatype behavior.

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

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

Schema description coverage is 100%, so all eight parameters are already documented. The description's phrase 'customizable time periods' only loosely gestures at interval/time_period and adds no format, enum, or behavioral detail beyond the schema.

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

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

States a specific verb ('Fetch') and resource ('Simple Moving Average (SMA) technical indicator time series'), making the core operation clear. It does not distinguish itself from closely related siblings like fetch_ema, fetch_rsi, or fetch_macd, leaving the agent to infer the choice.

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

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

Provides no guidance on when to use this tool rather than fetch_ema, fetch_rsi, or direct time-series tools. There are no stated prerequisites, exclusions, or alternative-selection rules.

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