get_technical_indicator

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

Annotations already declare readOnlyHint=true, idempotentHint=true and openWorldHint=true, so the safety profile is fully covered and the description's bar is lower. The description adds only that the result is a time series; it says nothing about pagination/row limits or the behavior of the optional 'month' backfill parameter beyond what the schema states.

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?

Two tight sentences, with the core purpose front-loaded before the supported-function list. The 14-item indicator list simply duplicates the schema enum, so it consumes space without adding new information.

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?

For a six-parameter analytical tool with no output schema, the description is adequate but thin: it never indicates the shape of the returned series (timestamp/value pairs, indicator-specific columns such as MACD's multi-line output). It is callable as written but leaves the response format to inference.

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 six parameters (including defaults for interval and series_type, ranges for time_period, and the month format) are already documented. The description restates the function enum verbatim without adding calculation semantics, which is the correct baseline-3 case.

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 clear verb+resource ('Get a technical indicator time series for a ticker') and enumerates the 14 supported indicators, so an agent knows exactly what it computes. It does not, however, distinguish itself from the sibling 'uw_technicals', leaving the boundary between the two unresolved.

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?

There is no when-to-use or when-not-to-use guidance, and no alternative tool is named. The indicator list implies the tool's scope but does not tell the agent when to prefer it over 'uw_technicals' or how it relates to the other market-data siblings.

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