tinyurl_read

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

With no annotations, the description does disclose useful behavior: it is a GET-based single-record read and it requires the 'Read TinyURL' token permission, which is real operational context. It does not say what happens on a missing/expired alias, whether the response includes metadata or only the destination, or anything about rate limits — notable gaps for a tool with zero annotation coverage.

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 compact sentences, front-loaded with the core action and endpoint, then the constraint and permission. No filler, though the endpoint path partially duplicates information the schema already conveys.

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 tool is simple (2 params, one required, no nesting), but there is no output schema and no annotations, so the description should ideally say what a successful read returns and how a nonexistent alias is signaled. Auth/permission and fixed-domain context are present; return-value and error semantics are absent.

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% and both parameters are self-documented in the schema (alias format 1-30 chars, domain enum fixed to tinyurl.com). The description restates the same facts ('requires alias', 'domain is fixed') without adding syntax, case-sensitivity, or format meaning beyond the schema. Baseline 3 applies.

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 — 'Read one exact TinyURL alias' — plus the underlying endpoint GET /alias/{domain}/{alias}, which makes the single-record scope unambiguous against bulk/analytics siblings. It never names a sibling explicitly, so differentiation is inferred from the verb rather than stated.

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?

'Requires alias; domain is fixed to tinyurl.com' gives preconditions but no when-to-use vs alternatives guidance (e.g., vs tinyurl_analytics_report or tinyurl_bulk_status). Usage is implied by 'read one exact alias' rather than spelled out.

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