get_market_summary

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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is largely covered. The description adds useful content scope (status plus a table of headline instruments), but says nothing about freshness, rate limits, or whether the underlying data is delayed/live.

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?

Front-loaded one-line summary followed by compact Args/Returns blocks; every line earns its place. The Returns block is mildly redundant given an output schema exists, but it is brief and does not bloat the definition.

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 single-parameter, zero-required tool with an output schema, the description covers the accepted region values and the shape of the response adequately. The only real gap is the unresolved overlap with get_market_status, which the description never clarifies.

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 coverage is 0% and the schema only types region as a bare string with a default. The description compensates by enumerating the full accepted set (US, GB, DE, FR, JP, HK, IN, CA, AU, BR, EUROPE, ASIA) and restating the default, which is the enum the schema lacks. It does not explain semantics of EUROPE/ASIA aggregates vs country codes, keeping it out of the top band.

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 market overview for a region') and enumerates the content covered: open/closed status plus indices, futures, bonds and FX. This partially separates it from siblings like get_market_status and get_market_indices, but it never names them explicitly as alternatives or subsets.

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?

Usage is only implied by the description of what is returned. There is no explicit when-to-use guidance and no mention of when to prefer the narrower get_market_status or get_market_indices siblings, leaving the agent to infer the boundary.

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