create_custom_feed

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

The description discloses the monthly cost ($0.50/month) and the output (dedicated endpoint), providing some behavioral insight. However, it does not mention side effects like billing activation, authentication requirements, or impact on existing feeds, which leaves transparency gaps given no annotations.

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?

The description is two sentences with no waste. It front-loads the main verb and quickly conveys cost and deliverable, making every line informative.

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?

Without an output schema, the description fails to explain the exact return payload beyond 'dedicated endpoint.' It also omits how to retrieve or manage the feed later, rate limits, and any post-creation behavior, making it incomplete for a paid creation tool.

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 100%, so parameters already have descriptions. The tool description only mentions 'keywords and source preferences' which maps to existing schema fields without adding any extra semantic context.

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?

The description clearly states the tool creates a custom news feed and mentions the dedicated endpoint deliverable. It distinguishes from read-only news tools like get_crypto_news by emphasizing creation and personalization.

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?

The description gives no guidance on when to use this tool versus alternatives such as subscribe_news_firehose or get_crypto_news. There are no exclusions, prerequisites, or clear context for selection.

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