Islam West Africa Collection (IWAC)

Press language metrics

get_lexical_metrics

Read-onlyIdempotent

Text length, lexical richness and readability by country/newspaper/year. Metrics are precomputed; readability is French-specific and excludes other languages. Missing values are disclosed. Compare distributions as descriptive evidence.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "get_lexical_metrics"
  }
}

Input Schema

Name	Required	Description
`exact`	No	AND values. Fields: subject/spatial/author/language/country/newspaper/topic_id/min_prob/scored_by; country_raw=whole cell; polarity:<model>.
`top_n`	No	Groups returned when grouping by newspaper (default 20, max 60)
`country`	No	Exact country name (accents optional)
`date_to`	No
`keyword`	No
`subject`	No	Exact tag
`group_by`	No	year (default) \| newspaper \| country
`date_from`	No	Inclusive date bounds: YYYY[-MM[-DD]]
`newspaper`	No	Newspaper/periodical substring
`hijri_year`	No
`hijri_month`	No
`keyword_mode`	No	literal: the whole keyword as one substring
`keyword_aliases`	No

Output Schema

Name	Required	Description	Default
`note`	No
`view`	Yes
`groups`	Yes
`filters`	Yes
`metrics`	Yes
`group_by`	Yes
`total_matches`	Yes
`readability_excluded`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedOct 29, 2026
- addedInput schema / additionalProperties
```
Added value: +false
```
- addedInput schema / properties / keyword_mode / description
```
Added value: +"literal: the whole keyword as one substring"
```

Changed14 schema fields changedOct 6, 2026

changedInput schema / properties / country / description

Previous value: -"Exact country name: Benin | Burkina Faso | Côte d'Ivoire | Niger | Nigeria | Togo (accents optional)"New value: +"Exact country name (accents optional)"

changedInput schema / properties / date_from / description

Previous value: -"YYYY-MM-DD (or YYYY)"New value: +"Inclusive date bounds: YYYY[-MM[-DD]]"

removedInput schema / properties / date_to / description
```
Removed value: -"YYYY-MM-DD (or YYYY)"
```

addedInput schema / properties / exact

Added value: +{
+  "additionalProperties": {
+    "items": {
+      "type": "string"
+    },
+    "maxItems": 20,
+    "minItems": 1,
+    "type": "array"
+  },
+  "description": "AND values. Fields: subject/spatial/author/language/country/newspaper/topic_id/min_prob/scored_by; country_raw=whole cell; polarity:<model>.",
+  "propertyNames": {
+    "type": "string"
+  },
+  "type": "object"
+}

addedInput schema / properties / hijri_month
```
Added value: +{
+  "type": "string"
+}
```
addedInput schema / properties / hijri_year
```
Added value: +{
+  "type": "integer"
+}
```

removedInput schema / properties / keyword / description

Removed value: -"ONE French concept keyword; substring over the subset's text fields"

addedInput schema / properties / keyword / minLength
```
Added value: +1
```

addedInput schema / properties / keyword_aliases

Added value: +{
+  "items": {
+    "minLength": 1,
+    "type": "string"
+  },
+  "maxItems": 12,
+  "type": "array"
+}

addedInput schema / properties / keyword_mode

Added value: +{
+  "enum": [
+    "literal",
+    "all_terms"
+  ],
+  "type": "string"
+}

changedInput schema / properties / newspaper / description

Previous value: -"Newspaper (articles) or periodical/series title (publications)"New value: +"Newspaper/periodical substring"

changedInput schema / properties / subject / description

Previous value: -"Exact subject tag (pipe-aware)"New value: +"Exact tag"

removedInput schema / properties / top_n / maximum
```
Removed value: -9007199254740991
```
removedInput schema / properties / top_n / minimum
```
Removed value: --9007199254740991
```

Changed2 schema fields changedJul 29, 2026

changedInput schema / $schema

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

changedOutput schema / $schema

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

AddedJul 28, 2026

TDQS

A3.6/5.0

Behavior4/5

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

The description adds useful behavioral context beyond the annotations: metrics are precomputed, readability is French-specific and excludes other languages, and missing values are disclosed. With read-only and idempotent annotations already covering the safety profile, these limitations are exactly the kind of extra context an agent needs.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is compact and front-loads what metrics are returned and how they are grouped. The final sentence about comparing distributions is somewhat vague, but overall there is little wasted text.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Because an output schema exists, the description need not document return values. However, this is a complex 13-parameter tool with many sibling alternatives, and the description does not fully cover filtering semantics or selection guidance, leaving it only adequately complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 62%, so some parameter meaning is already documented. The description adds the grouping dimensions country/newspaper/year but does not explain filters such as exact, keyword aliases, date bounds, or top_n, leaving a meaningful gap at this coverage level.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly identifies the returned resource: text length, lexical richness and readability grouped by country/newspaper/year. It does not explicitly distinguish this tool from sibling distribution and statistics tools such as get_collection_stats or get_country_comparison, so it stops short of a 5.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The phrase 'Compare distributions as descriptive evidence' gives an implied use case, but the description does not state when to choose this tool over sibling alternatives or when not to use it. Usage is therefore inferable but not explicit.

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

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