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

With no annotations, the description carries the burden and does notable work: 'KEY REQUIRED' (auth requirement), 'no credits', '60/day' (rate limit) are all disclosed up front. It also describes the return payload per stream. It stops short of stating what happens on an invalid date or unpublished stream.

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 with the critical key/rate-limit banner, then purpose, then streams, then the date rule. Every sentence earns its place. Slightly penalized because the full Korean and English restatement roughly doubles the length for the same 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?

No output schema exists, and the description compensates by describing the record contents per stream, so an agent knows what it will receive. The omission is failure-mode behavior (invalid date, empty stream) and any pointer to the latest_content alternative.

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 a 3 is the baseline, but the description goes beyond the enum: it explains what each stream value actually yields (verified provisions and FAQ for daily, live-confirmed references for tech, source domains for news, attached verified records for precedent). That meaningfully enriches the enum semantics.

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 and resource (fetch one published daily post as a full record) and enumerates all six streams with what each contains (verified provisions, source domains, attached precedent records). The only gap is sibling differentiation: latest_content and search are never named, so an agent could confuse the omit-date behavior with latest_content.

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?

Gives one concrete usage rule — pass a date, or omit it for the latest post in that stream — plus auth/rate-limit context. However it never says when to prefer this over latest_content or search, leaving the main selection ambiguity unaddressed.

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