get_latest_session

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

No annotations are provided, so the description carries the full burden. 'Retrieve' makes the read-only nature clear and it discloses exactly which fields are returned, but it says nothing about failure modes (e.g., no sessions existing), R2/auth requirements, or which input source takes precedence. Adequate but with real gaps for a zero-annotation tool.

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?

A single, well-formed sentence that front-loads the verb and lists the returned content without padding. Slightly dense field enumeration but nothing wasted.

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?

With no output schema, the description usefully names the returned fields, which compensates well. But it never explains how the four optional selectors (watch_url, session_id, session_data, session_file) relate or which takes precedence when several are supplied, leaving an operational gap for a 4-param 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 description coverage is 100%, so all four optional parameters are already documented in the schema, and the description adds only the notion of 'latest or specified' rather than field syntax or precedence. Baseline 3 is appropriate when the schema does the heavy lifting.

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 gives a specific verb ('Retrieve') and resource ('QuickCast recording session') and even enumerates the returned fields (metadata, duration, markers, R2 watch URL). It is clearly a single-session retrieval, distinguishing it from list_recent_sessions and ingest_session. It stops short of naming a sibling explicitly, so no differentiation credit beyond inference.

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 phrase 'latest or specified' implies when the tool is used (returns newest by default, or a targeted one when identified), which is useful implied context. However, no alternative tool is named and no condition tells the agent when to prefer list_recent_sessions or ingest_session instead.

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